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Table 1 Clusters of Orthologous Groups of proteins (COG) associated with the degradation of carbohydrates and proteins and with methanogenesis identified in the metagenome dataset of the thermophilic biogas microbiome

From: Unraveling the microbiome of a thermophilic biogas plant by metagenome and metatranscriptome analysis complemented by characterization of bacterial and archaeal isolates

Environmental gene tag

Assigned sequences

Environmental gene tag

Assigned sequences

COG accession

Function

COG accession

Function

Polysaccharide degradation and metabolism

Methanogenesis—hydrogenotrophic pathway

COG0366

Glucosidase

12,524

COG1229

Formylmethanofuran dehydrogenase, subunit A

839

COG1472

Periplasmic beta-galactosidase and related glycosidasesa

11,683

COG2218

Formylmethanofuran dehydrogenase, subunit C

541

COG3459

Cellobiose phosphorylase

10,420

COG2191

Formylmethanofuran dehydrogenase, subunit E

371

COG1501

Alpha-glycosidase, GH31 family

5616

COG1153

Formylmethanofuran dehydrogenase, subunit D

212

COG2730

Aryl-phospho-beta-D-glycosidase BglC, GH1 family

2588

COG2037

Formylmethanofuran: H4MPT formyltransferase

269

COG1874

Beta-galactosidase GanA

1714

COG3252

Methenyl-H4MPT cyclohydrolase

227

COG2160

L-arabinose isomerase

1539

COG1962

H4MPT S-methyltransferase, subunit H

246

COG3345

Alpha-galactosidase

1385

COG4064

H4MPT S-methyltransferase, subunit G

181

COG1904

Glucuronate isomerase

1030

COG4059

H4MPT S-methyltransferase, subunit E

167

COG3325

Chitinase, GH18 family

958

COG4061

H4MPT S-methyltransferase, subunit C

151

COG3405

Endo-1,4-beta-D-glucanase Yb

854

COG4060

H4MPT S-methyltransferase, subunit D

150

COG4124

Beta-mannanasec

152

COG4063

H4MPT S-methyltransferase, subunit A

121

COG5297

Cellulase/cellobiase CelA1

136

COG4062

H4MPT S-methyltransferase, subunit B

14

COG0726

Peptidoglucan/xylan/chitin deacetylase, PgdA/CDA1 family

5831

COG4218

H4MPT S-methyltransferase, subunit F

8

COG3507

Beta-xylosidase

4780

   

GOG3693

Endo-1,4-beta-xylanase, GH 35 family

3797

Methanogenesis—acetoclastic pathway

GOG4213

ABC-type xylose transport system, periplasmic component

1628

COG1614

CO dehydrogenase/acetyl-CoA synthase, subunit β

510

GOG2115

Xylose isomerase

1591

COG1456

CO dehydrogenase/acetyl-CoA synthase, subunit γ (corrinoid Fe-S protein)

353

COG5434

Polygalacturonase

1023

COG2069

CO dehydrogenase/acetyl-CoA synthase, subunit δ (corrinoid Fe-S protein)

214

COG3867

Arabinogalactan endo-1,4-beta-galactosidase

823

COG1152

CO dehydrogenase/acetyl-CoA synthase, subunit α

198

COG3866

Pectate lyase

541

COG1880

CO dehydrogenase/acetyl-CoA synthase,subunit ε

55

COG4677

Pectin methylesterase and related acyl-CoA thioesterases

228

   

COG2132

Multicopper oxidase with three cupredoxin domains (includes cell division protein FtsP and spore coat protein CotA)

423

Methanogenesis—hydrogenotrophic and acetoclastic pathway

COG4058

Methyl coenzyme-M reductase, subunit α

719

   

COG4054

Methyl coenzyme-M reductase, subunit β

550

Protein degradation

COG4057

Methyl coenzyme-M reductase, subunit γ

270

COG0740

ATP-dependent protease ClpP, protease subunit

5178

COG4055

Methyl coenzyme-M reductase, subunit D

194

   

COG4056

Methyl coenzyme-M reductase, subunit C

107

  1. aGH3 family
  2. bGH8 family
  3. cGH26 family