Supplemental material Analytical methods. For Chla analyses, duplicate volumes of 500 ml of whole seawater were filtered through GF/F filters (Whatman). Chla was extracted overnight at 4 C° in 90% acetone and concentration was measured by fluorescence using a 10-AU Fluorometer (Turner Designs; Yentsch and Menzel, 1963). Dissolved DMSP (DMSPd) was measured following the procedure described by Kiene and Slezak (2006). Briefly, the first 3.5 ml of seawater filtered by gravity through a 47 mm-diameter GF/F filter (Whatman) were acidified with addition of 15 µl of 50% H2SO4 (v:v) to preserve DMSP. During analysis, DMSPd was converted to DMS by alkaline hydrolysis, cryotrapped and detected by sulfur-specific gas chromatography. Total DMSP (DMSPt) concentration was determined similarly in a 1 ml subsample of acidified seawater (50 ml of whole seawater in 175 µl of 50% H2SO4). Bacterial production was measured by 3Hleucine incorporation into trichloroacetic acid-insoluble material (Kirchman, 1993). Incubations were carried out in triplicate in the dark at in situ temperature with additions of 20 nM of 3H-leucine for 4 hours, starting immediately after water collection. One TCA-killed sample was used as a control. Samples were processed by the microcentrifugation method (Smith and Azam, 1992). RNA preparation . RNA was extracted using the RNeasy kit (Qiagen) with a modified protocol. Trace amounts of DNA were removed from samples by treating with the TURBO DNA-free kit (Ambion, Austin, TX), producing 1.4 g of total RNA per filter. Ribosomal RNA was subsequently removed using two methods: an enzymatic treatment using the mRNA-ONLY Prokaryotic mRNA Isolation kit (Epicentre Biotechnologies, Madison, WI) and magnetic subtractive hybridization of rRNA using the MICROBEnrich kit (Ambion) and MICROBExpress kit (Ambion) (2 rounds of each). Approximately 50-75 ng of sample was then amplified using the MessageAmp IIBacteria kit (Ambion). Amplified RNA was converted to double-stranded cDNA using the Universal RiboClone cDNA Synthesis System (Promega). Final cDNA was purified with the Wizard DNA Clean-up System (Promega). The cDNA concentration was estimated using spectrophotometric quantification (Nanodrop). A total of 3.5 µg of cDNA per treatment were obtained. Supplementary Table S1. Annotation of Control and DMSP transcriptomes. ________________________________________________________________________ Number of reads Percentage Control DMSP Control DMSP ________________________________________________________________________ Total reads (raw) Total unique reads 301179 266771 305107 274579 100 89 100 90 Ribosomal RNA reads 153930 145947 51 48 Possible protein-encoding sequences 147249 159160 49 52 RefSeq Identified 66804 81173 22 27 GOS (non-RefSeq) Identified 25599 27343 8 9 nr Identified 787 874 0.3 0.3 Unidentified in RefSeq, GOS and nr 54059 49770 18 16 KEGG-assigned Reads 60100 73289 20 24 COG-assigned Reads 38469 51644 13 17 ________________________________________________________________________ Supplementary Table S2. Selected reference genes for BLAST analysis. ________________________________________________________________________________________________________________________________________________ Functional Category Acrylate degradation Label C3 Gene or Locus Tag Annotation Accession Number Strain Group Source # Hits CONTROL DMSP SPO1094 Propionyl-CoA carboxylase AAV94394.1 Ruegeria DSS3 Alpha Gifford et al. in prep 12 25 MGP11163 Propionyl-CoA carboxylase ZP_01625303 HTCC2080 Gamma 3 11 SPO1097 conserved hypothetical AAV94397.1 Ruegeria DSS3 Alpha 1 6 SPO1100 lipoprotein, putative AAV94400.1 Ruegeria DSS3 Alpha 20 18 SPO1101 pccA_propionyl-CoA carboxylase AAV94401.1 Ruegeria DSS3 Alpha 0 0 SPO1102 lipoprotein, putative AAV94402.1 Ruegeria DSS3 Alpha 0 0 SPO1104 hypothetical protein AAV94404.1 Ruegeria DSS3 Alpha 0 6 SPO2934 propionate--CoA ligase AAV96175.1 Ruegeria DSS3 Alpha 12 30 prpE hypthetical protein YP_266048 SAR11_HTCC0624 Alpha 14 19 ________________________________________________________________________________________________________________________________________________ DMS production dddD dddD DMSP acyl CoA transferase ABR72937 MWYL1 Gamma Todd et al. 2007 2 6 ZP_01746034 SS E-37 Alpha 0 2 ZP01224900 HTCC2207 Gamma 1 0 dddL dddL DMSP lyase ZP_00955343 Sulfitobact. EE-36 Alpha Curson et al. 2008 0 0 YP_351475.1 Rhodobct sph. 2.4.1 Alpha 0 0 dddP dddP metallopeptidase, family M24 AAV95561.1 Ruegeria DSS3 Alpha Todd et al.2009 3 4 ________________________________________________________________________________________________________________________________________________ DMSP dmdA dmdA putative aminomethyltransferase ZP_01625100 HTCC2080 Gamma Howard et al 08 0 2 demethylation dmdA putative DMSP demethylase YP_265671 SAR11_HTCC0246 Alpha Howard et al 06 6 9 dmdA putative aminomethyltransferase EDZ61098 SAR11_HTCC1062 Alpha Howard et al 08 6 11 SPO1913 putative DMSP demethylase AAV95190.1 Ruegeria DSS-3 Alpha Howard et al 06 11 16 ________________________________________________________________________________________________________________________________________________ DMS oxidation DMSox xoxF putative PQQ dehydrogenase protein YP_352636.1 Rhodobct sph. 2.4.1 Alpha 9 22 MDMS009 PQQ-dependent dehydrogenase YP_002669821 Methylophaga Gamma Schäfer, 2007 7 9 SS37_03200 putative methanol dehydrogenase jcventer SS E-37 Alpha 9 13 jcventer:1101159001453 ________________________________________________________________________________________________________________________________________________ MeSH incorp. MeSH metB cystathionine gamma-synthase BAE77371 E. coli K12 Gamma Kiene et al 1999 7 17 ________________________________________________________________________________________________________________________________________________ DMSP uptake TRANS opuAA GBT/proline ABC transporter AAV97366.1 Ruegeria DSS3 Alpha Moran et al 2004 33 40 system proV GBT/L-proline transport ATP-bind. YP_266219.1 SAR11_HTCC1062 Alpha Moran et al 2004 16 21 opuD GBT transporter AAV96421.1 Ruegeria DSS3 Alpha Moran et al 2004 1 3 opuAA GBT/l-proline transport ATP-bind. YP_266705.1 SAR11_HTCC1062 Alpha Moran et al 2004 0 0 ________________________________________________________________________________________________________________________________________________ DMSO reductase DMSOrd SPO3557 dimethyl sulfoxide reductase AAV96782.1 Ruegeria DSS3 Alpha Moran et al 2004 8 2 ________________________________________________________________________________________________________________________________________________ Inorg. S oxid. soxB SoxB sulfur oxidation B protein YP_166249.1 Ruegeria DSS3 Alpha Moran et al 2004 4 7 ________________________________________________________________________________________________________________________________________________ Assimilatory Sulfate cysD sulfate adenylyltransferase NP_417232.1 E.coli K12 Gamma Tripp et al. 2008 53 53 sulfate cysN sulfate adenylyltransferase NP_417231.1 E.coli K12 Gamma Tripp et al. 2008 0 0 reduction cysH phosphoadenosine phosphosulfate red NP_417242.1 E.coli K12 Gamma Tripp et al. 2008 0 0 cysI sulfite reductase NP_417243.1 E.coli K12 Gamma Tripp et al. 2008 0 0 cysJ sulfite reductase, alpha subunit NP_417244.1 E.coli K12 Gamma Tripp et al. 2008 0 0 SPO0900 sulfate adenylyltransferase YP_166153.1 Ruegeria DSS3 Alpha Moran et al 2004 5 20 SPO2634 sulfite reductase YP_167844.1 Ruegeria DSS3 Alpha Moran et al 2004 9 7 SPO2635 phosophoadenylyl-sulfate reductase YP_167845.1 Ruegeria DSS3 Alpha Moran et al 2004 6 0 ________________________________________________________________________________________________________________________________________________ MSA MSA msmA hydroxylase alpha subunit 2 AAK84308 Marinosulf. methyl. Alpha Baxter et al 2002 4 11 Monooxygenase msmB hydroxylase beta subunit AAK84302 Marinosulf. methyl. Alpha 1 1 msmC ferredoxin AAK84303 Marinosulf. methyl. Alpha 0 2 msmD putative LysR transcriptional AAK84304 Marinosulf. methyl. Alpha 1 2 msmA MSA monooxygenase hydroxylase ABK97404 Sargasso-2218644 Leitao et al. 2009 8 10 msmB MSA monooxygenase hydroxylase ABK97405 Sargasso-2218645 1 2 msmC MSA monooxygenase ferredoxin ABK97406 Sargasso-2218646 0 1 msmD MSA monooxygenase reductase ABK97407 Sargasso-2218647 1 1 ________________________________________________________________________________________________________________________________________________ Upregulated MICRO SPOA0268 transcriptional regulator, IclR family AAV97402.1 Ruegeria DSS3 Alpha Gifford et al.prep 0 0 genes in SPOA0269 conserved hypothetical protein AAV97403.1 Ruegeria DSS3 Alpha 6 1 Roseo- microarray MGP 08771 selenium-binding protein ZP_01626818 HTCC2080 Gamma 7 4 after DMSP SPOA0270 conserved hypothetical protein AAV97404.1 Ruegeria DSS3 Alpha 0 0 addition SPOA0271 methylamine utilization protein MauG AAV97405.1 Ruegeria DSS3 Alpha 0 1 MGP 08766 methylamine utilization protein MauG ZP_01626817 HTCC2080 Gamma 0 1 SPOA0272 glutathione-dpnt formaldehyde dehydr. AAV97406.1 Ruegeria DSS3 Alpha 9 6 MGP 12693 Zn-containing alcohol dehydrogenase ZP_01626542 HTCC2080 Gamma 9 10 SPOA0273 DNA-binding protein, putative AAV97407.1 Ruegeria DSS3 Alpha 0 0 SPO0453 conserved hypothetical protein AAV93771.1 Ruegeria DSS3 Alpha 0 0 ________________________________________________________________________________________________________________________________________________ Glycine betaine GBT SPO2134 trimethylamine methyltransferase AAV95403.1 Ruegeria DSS3 Alpha Moran et al 2004 5 2 degradation MttB trimethylamine methyltransferase ZP_01626141 HTCC2080 Gamma 0 3 SPO0565 trimethylamine methyltransferase YP_165825.1 Ruegeria DSS3 Alpha Moran et al 2004 7 9 soxB sarcosine oxidase AAZ21869 SAR11_HTCC1062 Alpha Moran et al 2004 43 55 ________________________________________________________________________________________________________________________________________________ Proteorhodopsin PROT EF640904 proteorhodopsin ABR27795 SAR11_HTCC1013 Alpha NCBI 463 249 OM2255 bacteriorhodopsin ZP_01447408 Roseo_HTCC2255 Alpha NCBI 245 229 EF182737.1 proteorho dopsin ABO88140 HTCC2207 Gamma NCBI 71 58 ________________________________________________________________________________________________________________________________________________ ATP synthase ATP atpC ATP synthase F1 AAV96396.1 Ruegeria DSS3 Alpha Moran et al 2004 6 4 atpC ATP synthase epsilon chain YP_265653.1 SAR11_HTCC1062 Alpha Giovannoni et al 05 1 5 MGP 03410 ATP synthase subunit beta ZP_01625638 HTCC2080 Gamma 154 273 ________________________________________________________________________________________________________________________________________________ Strain abbreviations are as follows: Ruegeria DSS3: Ruegeria pomeroyi DSS-3. HTCC2080: Marine gammaproteobacterium HTCC2080. SAR11_HTCC#: Candidatus Pelagibacter ubique HTCC#. Roseo_HTCC2255: Rhodobacterales bacterium HTCC2255. MWYL1: Marinomonas MWYL1. SS E-37: Sagitulla stellata E-37. Rhodobct sph. 2.4.1: Rhodobacter sphaeroides 2.4.1. HTCC2207: Marine gammaproteobacterium HTCC2207. Marinosulf. methyl.: Marinosulfonomonas methylotropha. Sargasso_#: uncultured bacterium Sargasso-# retrieved from the Sargasso Sea metagenome (Venter et al 2004). Locus tag abbreviation: MGP#: MGP2080_#. Supplementary Table S3. KEGG pathways significantly depleted or enriched in the Sargasso Sea transcriptome after DMSP addition. Pathway number is indicated in parenthesis. Significance levels above 90% are indicated with one (95%) or two (98%) asterisks. _________________________________________________________________________________________________________________________________ CATEGORY DEPLETED ENRICHED Nucleotide Metabolism Pyrimidine metabolism (00240)** Purine metabolism (00230)* _________________________________________________________________________________________________________________________________ Transcription RNA polymerase (03020)** Ribosome (03010)** _____________________________________________________________________________________________________________________________ ____ Translation Aminoacyl-tRNA biosynthesis (00970)* _____________________________________________________________________________________________________________________________ ____ § Energy Metabolism Photosynthesis (00195)** Reductive carboxylate cycle (CO2 fixation) (00720) Photosynthesis - antenna proteins (00196)** _____________________________________________________________________________________________________________________________ ____ Amino Acid Metabolism Glutamate metabolism (00251) Valine, leucine and isoleucine degradation (00280)* Valine, leucine and isoleucine biosynthesis (00290) _____________________________________________________________________________________________________________________________ ____ Metabolism of Other Amino Acids Porphyrin and chlorophyll metabolism (00860)* Beta-alanine metabolism (00410) D-Glutamine and D-glutamate metabolism (00471) _____________________________________________________________________________________________________________________________ ____ Carbohydrate Metabolism Citrate cycle (TCA cycle) (00020) Nucleotide sugars metabolism (00520) Propanoate metabolism (00640) _________________________________________________________________________________________________________________________________ Lipid Metabolism Fatty acid metabolism (00071) _____________________________________________________________________________________________________________________________ ____ Glycan Biosynthesis and Metabolism Peptidoglycan biosynthesis (00550) Lipopolysaccharide biosynthesis (00540)* Metabolism of Cofactors and Vitamins Ubiquinone biosynthesis (00130) _____________________________________________________________________________________________________________________________ ____ Xenobiotics Biodegradation and Metabolism Biphenyl degradation (00621) Geraniol degradation (00281) Benzoate degradation via CoA ligation (00632) _________________________________________________________________________________________________________________________________ Biosynthesis of Secondary Metabolites Limonene and pinene degradation (00903) _____________________________________________________________________________________________________________________________ ____ Membrane Transport ABC transporters (02010)** _____________________________________________________________________________________________________________________________ ____ Signal Transduction Two-component systems (02020)** _________________________________________________________________________________________________________________________________ Cell Motility Flagellar assembly (02040)** Bacterial chemotaxis (02030) _________________________________________________________________________________________________________________________________ Folding, Sorting and Degradation Protein export (03060)** _____________________________________________________________________________________________________________________________ ____ + Metabolic Disorders chaperone [Type I diabetes mellitus (04940)]** _____________________________________________________________________________________________________________________________ ____ + Neurodegenerative Disorders chaperone [Prion disease (05060)]** _________________________________________________________________________________________________________________________________ + Immune System chaperone [Antigen processing (04612)] _________________________________________________________________________________________________________________________________ + + Endocrine System chaperone (Progesterone-mediated putative acyl-CoA dehydrogenase oocyte maturation (04914)) [PPAR signaling pathway (03320)] _________________________________________________________________________________________________________________________________ § This pathway has significant overlap with TCA cycle enzymes + Annotation based on BLAST analysis of transcript sequences. The KEGG pathway name is given in brackets. Supplementary Table S4. COG categories significantly depleted or enriched in the Sargasso Sea transcriptome after DMSP addition. Significance levels above 90% are indicated with one (95%) or two (98%) asterisks. _________________________________________________________________________________________________________________________________ GENERAL FUNCTIONAL DEPLETED ENRICHED CATEGORY CATEGORY _____________________________________________________________________________________________________________________________ ____ Metabolism Energy production and conversion Ribulose bisphosphate carboxylase small subunit** Na+-transporting NADH:ubiquinone oxidored. ** Formate hydrogenlyase sub6/NADH:ubiquinone * Inorganic pyrophosphatase* Rubrerythrin* F0F1-type ATP synthase, beta subunit* F0F1-type ATP synthase, subunit c/Archaeal/vacuola* F0F1-type ATP synthase, gamma subunit* NADH:ubiquinone oxidoreductase subunit 1 (chain H)* NAD-dependent aldehyde dehydrogenases NADH:ubiquinone oxidoreductase subunit 4 (chain M) Na+/H+-dicarboxylate symporters Isocitrate lyase Aerobic-type carbon monoxide dehydrogenase NADH:ubiquinone oxidoreductase subunit 3 (chain A) Citrate synthase Aldehyde:ferredoxin oxidoreductase Rieske Fe-S protein Ferredoxin Isocitrate dehydrogenases NADH:ubiquinone oxidoreductase 24 kD subunit Pyruvate:ferredoxin oxidoreductase Aerobic-type carbon monoxide dehydrogenase NADPH:quinone reductase and related Zn-dependent ________________________________________________________________________________________________________________ Amino acid transport ABC-type proline/glycine betaine transport systems** Tryptophan synthase beta chain* and metabolism Spermidine/putrescine-binding periplasmic protein* Dipeptide/tripeptide permease* ABC-type dipeptide transport system Diaminopimelate decarboxylase ABC-type amino acid transport system Cysteine synthase Urea amidohydrolase (urease) alpha subunit Isopropylmalate/homocitrate/citramalate synthases Oligoendopeptidase F Glycine/D-amino acid oxidases (deaminating) Gamma-glutamyl phosphate reductase Tetrahydrodipicolinate N-succinyltransferase Arginine kinase O-acetylhomoserine sulfhydrylase ABC-type amino acid transport/signal transduction Carbamoylphosphate synthase large subunit ________________________________________________________________________________________________________________ Nucleotide transport Cytidine deaminase Thymidine kinase and metabolism Xanthine/uracil permeases Phosphoribosylformylglycinamidine (FGAM) synthase dGTP triphosphohydrolase Thymidylate synthase Phosphoribosylamine-glycine ligase Aspartate carbamoyltransferase, catalytic chain Phosphoribosylpyrophosphate synthetase Cytosine deaminase and related metal-dependent hy _______________________________________________________________________________________________________________ Carbohydrate transport Ribulose 1,5-bisphosphate carboxylase, large subunit* 2-keto-3-deoxy-6-phosphogluconate aldolase and metabolism ADP-glucose pyrophosphorylase* Sugar phosphate isomerases/epimerases ABC-type sugar transport system* Fructose-1,6-bisphosphate aldolase Ribulose-5-phosphate 4-epimerase Fructose-1,6-bisphosphatase Phosphoheptose isomerase Beta-galactosidase/beta-glucuronidase Gluconolactonase _______________________________________________________________________________________________________________ Coenzyme metabolism Porphobilinogen deaminase NAD synthase* Protoheme ferro-lyase (ferrochelatase) Precorrin-2 methylase 6-pyruvoyl-tetrahydropterin synthase Gamma-glutamylcysteine synthetase 4-hydroxybenzoate polyprenyltransferase 5,10-methylene-tetrahydrofolate dehydrogenase Glutamyl-tRNA reductase GTP cyclohydrolase II Dinucleotide-utilizing enzymes involved in Mo _______________________________________________________________________________________________________________ Lipid metabolism Fatty-acid desaturase* Acyl-CoA dehydrogenases** Phosphatidylserine decarboxylase Enoyl-CoA hydratase/carnithine racemase* Oligoketide cyclase/lipid transport protein Acetyl-CoA carboxylase* Phosphatidylserine synthase 3-oxoacyl-(acyl-carrier-protein) synthase _______________________________________________________________________________________________________________ Secondary metabolites Putative multicopper oxidases* ABC-type transport system biosynthesis, transport RTX toxins and related Ca2+-binding proteins Cytochrome P450 and catabolism Imidazolonepropionase and related amidohydrolases _________________________________________________________________________________________________________________________________ Information storage Translation, ribosomal Protein implicated in ribosomal biogenesis, Nop56p* GTPases - translation elongation factors** and processing structure and biogenesis Ribosomal protein L27 Ribosomal protein L11** NAD(FAD)-utilizing enzyme Ribosomal protein L1** Ribosomal protein S3** Ribosomal protein L16/L10E** Translation elongation factors (GTPases)** Polyribonucleotide nucleotidyltransferase ** Ribosomal protein S12* Ribosomal protein S7* Ribosomal protein L3* Ribosomal protein L2* Ribosomal protein L22* Ribosomal protein L14* Ribosomal protein L6P/L9E* Ribosomal protein S5* Aspartyl-tRNA synthetase* Ribosomal protein L15* Ribosomal protein L18* Prolyl-tRNA synthetase Translation initiation factor 2 (IF-2; GTPase)* Ribosomal protein S1* Ribonucleases G and E* Predicted GTPase, probable translation factor Phenylalanyl-tRNA synthetase alpha subunit Isoleucyl-tRNA synthetase Phenylalanyl-tRNA synthetase beta subunit Ribosomal protein L4 Ribosomal protein S8 Ribosomal protein S11 Ribosomal protein S19 Ribosomal protein S14 Ribosomal protein L17 Ribosomal protein S18 RNase PH ________________________________________________________________________________________________________________ Transcription Cold shock proteins** DNA-directed RNA polymerase, beta sub/140 kDs** DNA-directed RNA polymerase, sigma subunit7 DNA-directed RNA polymerase, beta sub/160 kD** Putative transcriptional regulator, homolog of Bvg Transcription antiterminator** DNA-directed RNA polymerase Transcription elongation factor* Response regulator consisting of a CheY NAD-dependent protein deacetylases, SIR2 family _______________________________________________________________________________________________________________ DNA replication, Bacterial nucleoid DNA-binding protein** Recombinational DNA repair protein (RecF pathway)* recombination Nucleotidyltransferase/DNA polymerase ATPase involved in DNA replication initiation* and repair Recombinational DNA repair ATPase (RecF pathway) Topoisomerase IA 3 Superfamily II DNA and RNA helicases Retron-type reverse transcriptase _________________________________________________________________________________________________________________________________ Cellular processes Cell envelope biogenesis, UDP-N-acetylmuramyl pentapeptide P-transferase* Predicted membrane-associated Zn-dpendnt protease* outer membrane UDP-N-acetylmuramate-alanine ligase UDP-3-O-acyl-N-acetylglucosamine deacetylase Membrane carboxypeptidase N-acetylglucosamine-1-phosphate uridyltransferase Periplasmic protease Periplasmic protein involved in polysaccharide exp Membrane-fusion protein 3-deoxy-D-manno-octulosonic acid (KDO)8-phosphate _______________________________________________________________________________________________________________ Cell motility and Flagellin and related hook-associated proteins** Flagellar basal-body P-ring protein* secretion Chemotaxis protein histidine kinase Type II secretory pathway, pseudopilin PulG Flagellar hook-basal body protein 9 Type II secretory pathway _______________________________________________________________________________________________________________ Posttranslational Molecular chaperone (small heat shock protein)** Predicted carbamoyl transferase, NodU family modification, protein Co-chaperonin GroES (HSP10)** Cysteine protease turnover, chaperones Trypsin-like serine proteases** Thiol:disulfide interchange protein Membrane protease subunits** Molecular chaperone** Chaperonin GroEL (HSP60 family)** ATP-dependent Zn proteases** ATP-dependent Lon protease, bacterial type** DnaJ-class molecular chaperone with C-terminal Zn** ATPases with chaperone activity, ATP-binding** Peroxiredoxin* Polyprenyltransferase* ATPases of the AAA+ class* Molecular chaperone, HSP90 family* Molecular chaperone GrpE (heat shock protein)* Glutaredoxin-related protein Cytochrome c biogenesis factor ABC-type transport system involved in cytochrome c ABC-type transport system involved in Fe-S cluster ATP-dependent protease HslVU (ClpYQ),ATPase subunit Glutamine synthetase adenylyltransferase _______________________________________________________________________________________________________________ Inorganic ion transport Kef-type K+ transport systems, membrane components* Outer membrane receptor proteins** and metabolism Heme oxygenase* Na+/H+ antiporter* GTPases - Sulfate adenylate transferase subunit 1 Arylsulfatase A and related enzymes ABC-type phosphate transport system, periplasmic K+ transport systems, NAD-binding component ABC-type phosphate transport system High-affinity Fe2+/Pb2+ permease Na+/H+ antiporter NhaD Phosphodiesterase/alkaline phosphatase D Uncharacterized copper-binding protein Nitrogenase subunit NifH (ATPase) ABC-type Fe3+-siderophore transport system Co/Zn/Cd efflux system component Cation transport ATPase Cation transport ATPase _______________________________________________________________________________________________________________ Cell envelope biogenesis, Outer membrane protein outer membrane _________________________________________________________________________________________________________________________________ Poorly characterized General function Predicted symporter** Predicted GTPase* prediction only Uncharacterized ABC-type transport system** Dioxygenases related to 2-nitropropane dioxygenase* Integral membrane protein, interacts with FtsH** Predicted P-loop-containing kinase GTPase SAR1 and related small G proteins* Predicted amidohydrolase Predicted permeases* Uncharacterized membrane protein Predicted Zn-dependent proteases* Uncharacterized anaerobic dehydrogenase Predicted transporter component* MoxR-like ATPases Predicted nucleotide-utilizing enzyme Acetyltransferase (isoleucine patch superfamily) Uncharacterized ABC-type transport system Isopenicillin N synthase and related dioxygenases ABC-type uncharacterized transport system Short-chain dehydrogenases Protein containing von Willebrand factor type A Predicted aminopeptidases Predicted pyrophosphatase Predicted nucleoside-diphosphate sugar epimerase RNA-binding proteins (RRM domain) AT-rich DNA-binding protein Bacteriorhodopsin Uncharacter. protein involved in propionate catabolism Uncharacterized protein DMSO reductase anchor subunit Predicted Fe-S oxidoreductases Pirin-related protein Predicted dioxygenase of extradiol dioxygenase Predicted Zn-dependent protease Predicted PP-loop superfamily ATPase Zn-dependent hydrolases, including glyoxylases Predicted phosphatase/phosphohexomutase Predicted dehydrogenase _______________________________________________________________________________________________________________ Function unknown Predicted membrane protein* Uncharacterized protein conserved in bacteria* Uncharacterized conserved protein* FOG: WD40-like repeat Uncharacterized low-complexity proteins* _________________________________________________________________________________________________________________________________ Defense Mechanisms Multidrug resistance efflux pump ABC-type antimicrobial peptide transport system ABC-type antimicrobial peptide transport system _____________________________________________________________________________________________________________________________ ____ Supplementary Table S5. Abundance of transcripts representing propanoate metabolism (KEGG pathway 00640) and the TCA cycle (KEGG pathway 00020), normalized by total possible protein-encoding sequences in each library. These ratios are shown in the table multiplied by 104. Transcripts are labeled based on the enzyme number in the KEGG map. Transcripts present in both pathways are shown only once. Significant differences between Control and DMSP treatments are labeled with an asterisk (95% significance level). _____________________________________________________________________________ Metabolism Trancript Control DMSP Control DMSP abundance abundance ratio ratio ______________________________________________________________________________ Propaonate EC:6.4.1.3 22 42 1.49 2.64 EC:6.4.1.2 57 71 3.87 4.46 EC:6.2.1.5 87 113 5.91 7.10 EC:6.2.1.17 5 11 0.34 0.69 EC:6.2.1.1 51 68 3.46 4.27 EC:5.4.99.2 13 16 0.88 1.01 EC:4.2.1.99 0 1 0.00 0.06 EC:4.2.1.79 7 22 0.48 1.38 *EC:4.2.1.17 57 125 3.87 7.85 EC:2.6.1.18 29 44 1.97 2.76 *EC:2.3.3.5 7 27 0.48 1.70 EC:1.3.99.3 74 146 5.03 9.17 *EC:1.2.7.1 2 15 0.14 0.94 EC:1.2.1.3 73 102 4.96 6.41 EC:1.2.1.27 28 39 1.90 2.45 EC:1.1.99.8 29 34 1.97 2.14 EC:6.4.1.1 13 17 0.88 1.07 TCA cycle EC:4.1.1.32 17 20 1.15 1.26 EC:4.2.1.2 16 27 1.09 1.70 EC:1.1.1.41 21 29 1.43 1.82 *EC:1.2.7.3 4 29 0.27 1.82 EC:2.3.1.61 25 32 1.70 2.01 EC:1.1.1.42 26 57 1.77 3.58 EC:4.1.1.49 41 59 2.78 3.71 EC:2.3.3.1 36 60 2.44 3.77 EC:1.1.1.37 47 68 3.19 4.27 EC:1.2.4.2 57 78 3.87 4.90 EC:1.8.1.4 58 89 3.94 5.59 EC:1.3.99.1 72 101 4.89 6.35 EC:4.2.1.3 91 130 6.18 8.17 EC:1.3.5.1 EC:1.3.99.13 170 0 252 3 11.55 0.00 15.83 0.19 References for Supplementary Information Baxter NJ, Scanlan J, De Marco P, Wood AP, Murrell JC (2002). 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