COG cluster associated with parent COG general functional cagegory: Posttranslational modification, protein turnover, chaperones
COG ID
Link to COG
Functional Description Protein Count
Link to
protein list

COG3118 Thioredoxin domain-containing protein [Posttranslational modification, protein turnover, chaperones] 232
COG4988 CydD ABC-type transport system involved in cytochrome bd biosynthesis, ATPase and permease components [Energy production and conversion / Posttranslational modification, protein turnover, chaperones] 216
COG4987 CydC ABC-type transport system involved in cytochrome bd biosynthesis, fused ATPase and permease components [Energy production and conversion / Posttranslational modification, protein turnover, chaperones] 215
COG4235 Cytochrome c biogenesis factor [Posttranslational modification, protein turnover, chaperones] 205
COG0464 SpoVK ATPases of the AAA+ class [Posttranslational modification, protein turnover, chaperones] 203
COG0396 sufC Cysteine desulfurase activator ATPase [Posttranslational modification, protein turnover, chaperones] 197
COG1222 RPT1 ATP-dependent 26S proteasome regulatory subunit [Posttranslational modification, protein turnover, chaperones] 190
COG0542 clpA ATP-binding subunits of Clp protease and DnaK/DnaJ chaperones [Posttranslational modification, protein turnover, chaperones] 185
COG1474 CDC6 Cdc6-related protein, AAA superfamily ATPase [DNA replication, recombination, and repair / Posttranslational modification, protein turnover, chaperones] 175
COG4133 CcmA ABC-type transport system involved in cytochrome c biogenesis, ATPase component [Posttranslational modification, protein turnover, chaperones] 171
COG0466 Lon ATP-dependent Lon protease, bacterial type [Posttranslational modification, protein turnover, chaperones] 164
COG1219 ClpX ATP-dependent protease Clp, ATPase subunit [Posttranslational modification, protein turnover, chaperones] 157
COG5265 ATM1 ABC-type transport system involved in Fe-S cluster assembly, permease and ATPase components [Posttranslational modification, protein turnover, chaperones] 155
COG3823 Glutamine cyclotransferase [Posttranslational modification, protein turnover, chaperones] 149
COG5082 AIR1 Arginine methyltransferase-interacting protein, contains RING Zn-finger [Posttranslational modification, protein turnover, chaperones / Intracellular trafficking and secretion] 134
COG0465 HflB ATP-dependent Zn proteases [Posttranslational modification, protein turnover, chaperones] 131
COG0378 HypB Ni2+-binding GTPase involved in regulation of expression and maturation of urease and hydrogenase [Posttranslational modification, protein turnover, chaperones / Transcription] 130
COG0492 TrxB Thioredoxin reductase [Posttranslational modification, protein turnover, chaperones] 126
COG2518 Pcm Protein-L-isoaspartate carboxylmethyltransferase [Posttranslational modification, protein turnover, chaperones] 116
COG3634 AhpF Alkyl hydroperoxide reductase, large subunit [Posttranslational modification, protein turnover, chaperones] 114
COG3914 Spy Predicted O-linked N-acetylglucosamine transferase, SPINDLY family [Posttranslational modification, protein turnover, chaperones] 111
COG0606 Predicted ATPase with chaperone activity [Posttranslational modification, protein turnover, chaperones] 109
COG5243 HRD1 HRD ubiquitin ligase complex, ER membrane component [Posttranslational modification, protein turnover, chaperones] 106
COG5574 PEX10 RING-finger-containing E3 ubiquitin ligase [Posttranslational modification, protein turnover, chaperones] 103
COG5540 RING-finger-containing ubiquitin ligase [Posttranslational modification, protein turnover, chaperones] 98
COG0265 DegQ Trypsin-like serine proteases, typically periplasmic, contain C-terminal PDZ domain [Posttranslational modification, protein turnover, chaperones] 93
COG5640 Secreted trypsin-like serine protease [Posttranslational modification, protein turnover, chaperones] 85
COG1220 HslU ATP-dependent protease HslVU (ClpYQ), ATPase subunit [Posttranslational modification, protein turnover, chaperones] 84
COG0695 GrxC Glutaredoxin and related proteins [Posttranslational modification, protein turnover, chaperones] 81
COG5194 APC11 Component of SCF ubiquitin ligase and anaphase-promoting complex [Posttranslational modification, protein turnover, chaperones / Cell division and chromosome partitioning] 75
COG4232 Thiol:disulfide interchange protein [Posttranslational modification, protein turnover, chaperones / Energy production and conversion] 73
COG0526 TrxA Thiol-disulfide isomerase and thioredoxins [Posttranslational modification, protein turnover, chaperones / Energy production and conversion] 72
COG5159 RPN6 26S proteasome regulatory complex component [Posttranslational modification, protein turnover, chaperones] 70
COG1076 DjlA DnaJ-domain-containing proteins 1 [Posttranslational modification, protein turnover, chaperones] 64
COG2143 Thioredoxin-related protein [Posttranslational modification, protein turnover, chaperones] 63
COG0520 csdA Selenocysteine lyase/Cysteine desulfurase [Posttranslational modification, protein turnover, chaperones] 61
COG0443 DnaK Molecular chaperone [Posttranslational modification, protein turnover, chaperones] 60
COG0484 DnaJ DnaJ-class molecular chaperone with C-terminal Zn finger domain [Posttranslational modification, protein turnover, chaperones] 60
COG1066 Sms Predicted ATP-dependent serine protease [Posttranslational modification, protein turnover, chaperones] 59
COG5077 Ubiquitin carboxyl-terminal hydrolase [Posttranslational modification, protein turnover, chaperones] 58
COG5207 UBP14 Isopeptidase T [Posttranslational modification, protein turnover, chaperones] 53
COG5116 RPN2 26S proteasome regulatory complex component [Posttranslational modification, protein turnover, chaperones] 51
COG5533 UBP5 Ubiquitin C-terminal hydrolase [Posttranslational modification, protein turnover, chaperones] 50
COG5078 Ubiquitin-protein ligase [Posttranslational modification, protein turnover, chaperones] 48
COG5560 UBP12 Ubiquitin C-terminal hydrolase [Posttranslational modification, protein turnover, chaperones] 48
COG2214 CbpA DnaJ-class molecular chaperone [Posttranslational modification, protein turnover, chaperones] 47
COG0625 Gst Glutathione S-transferase [Posttranslational modification, protein turnover, chaperones] 46
COG5656 SXM1 Importin, protein involved in nuclear import [Posttranslational modification, protein turnover, chaperones] 43
COG4870 Cysteine protease [Posttranslational modification, protein turnover, chaperones] 43
COG1225 Bcp Peroxiredoxin [Posttranslational modification, protein turnover, chaperones] 42
COG5269 ZUO1 Ribosome-associated chaperone zuotin [Translation, ribosomal structure and biogenesis / Posttranslational modification, protein turnover, chaperones] 42
COG5021 HUL4 Ubiquitin-protein ligase [Posttranslational modification, protein turnover, chaperones] 38
COG0435 ECM4 Predicted glutathione S-transferase [Posttranslational modification, protein turnover, chaperones] 35
COG3590 PepO Predicted metalloendopeptidase [Posttranslational modification, protein turnover, chaperones] 35
COG1331 Highly conserved protein containing a thioredoxin domain [Posttranslational modification, protein turnover, chaperones] 35
COG0638 PRE1 20S proteasome, alpha and beta subunits [Posttranslational modification, protein turnover, chaperones] 34
COG5550 Predicted aspartyl protease [Posttranslational modification, protein turnover, chaperones] 34
COG2999 GrxB Glutaredoxin 2 [Posttranslational modification, protein turnover, chaperones] 33
COG5044 MRS6 RAB proteins geranylgeranyltransferase component A (RAB escort protein) [Posttranslational modification, protein turnover, chaperones] 33
COG4545 Glutaredoxin-related protein [Posttranslational modification, protein turnover, chaperones] 31
COG5405 HslV ATP-dependent protease HslVU (ClpYQ), peptidase subunit [Posttranslational modification, protein turnover, chaperones] 31
COG5187 RPN7 26S proteasome regulatory complex component, contains PCI domain [Posttranslational modification, protein turnover, chaperones] 30
COG0459 GroL Chaperonin GroEL (HSP60 family) [Posttranslational modification, protein turnover, chaperones] 30
COG0652 PpiB Peptidyl-prolyl cis-trans isomerase (rotamase) - cyclophilin family [Posttranslational modification, protein turnover, chaperones] 28
COG5201 SKP1 SCF ubiquitin ligase, SKP1 component [Posttranslational modification, protein turnover, chaperones] 27
COG0450 AhpC Peroxiredoxin [Posttranslational modification, protein turnover, chaperones] 26
COG0616 SppA Periplasmic serine proteases (ClpP class) [Posttranslational modification, protein turnover, chaperones / Intracellular trafficking and secretion] 25
COG0071 IbpA Molecular chaperone (small heat shock protein) [Posttranslational modification, protein turnover, chaperones] 25
COG0326 HtpG Molecular chaperone, HSP90 family [Posttranslational modification, protein turnover, chaperones] 25
COG4067 Uncharacterized protein conserved in archaea [Posttranslational modification, protein turnover, chaperones] 24
COG5070 VRG4 Nucleotide-sugar transporter [Carbohydrate transport and metabolism / Posttranslational modification, protein turnover, chaperones / Intracellular trafficking and secretion] 24
COG1067 LonB Predicted ATP-dependent protease [Posttranslational modification, protein turnover, chaperones] 24
COG0740 ClpP Protease subunit of ATP-dependent Clp proteases [Posttranslational modification, protein turnover, chaperones / Intracellular trafficking and secretion] 24
COG0386 BtuE Glutathione peroxidase [Posttranslational modification, protein turnover, chaperones] 24
COG0278 Glutaredoxin-related protein [Posttranslational modification, protein turnover, chaperones] 23
COG1030 NfeD Membrane-bound serine protease (ClpP class) [Posttranslational modification, protein turnover, chaperones] 23
COG3484 Predicted proteasome-type protease [Posttranslational modification, protein turnover, chaperones] 22
COG2077 Tpx Peroxiredoxin [Posttranslational modification, protein turnover, chaperones] 21
COG1025 Ptr Secreted/periplasmic Zn-dependent peptidases, insulinase-like [Posttranslational modification, protein turnover, chaperones] 21
COG1928 PMT1 Dolichyl-phosphate-mannose--protein O-mannosyl transferase [Posttranslational modification, protein turnover, chaperones] 18
COG4070 Predicted peptidyl-prolyl cis-trans isomerase (rotamase), cyclophilin family [Posttranslational modification, protein turnover, chaperones] 18
COG5227 SMT3 Ubiquitin-like protein (sentrin) [Posttranslational modification, protein turnover, chaperones] 18
COG0678 AHP1 Peroxiredoxin [Posttranslational modification, protein turnover, chaperones] 18
COG0330 HflC Membrane protease subunits, stomatin/prohibitin homologs [Posttranslational modification, protein turnover, chaperones] 17
COG5647 Cullin, a subunit of E3 ubiquitin ligase [Posttranslational modification, protein turnover, chaperones] 16
COG1404 AprE Subtilisin-like serine proteases [Posttranslational modification, protein turnover, chaperones] 16
COG1730 GIM5 Predicted prefoldin, molecular chaperone implicated in de novo protein folding [Posttranslational modification, protein turnover, chaperones] 16
COG5539 Predicted cysteine protease (OTU family) [Posttranslational modification, protein turnover, chaperones] 15
COG0545 FkpA FKBP-type peptidyl-prolyl cis-trans isomerases 1 [Posttranslational modification, protein turnover, chaperones] 15
COG1382 GimC Prefoldin, chaperonin cofactor [Posttranslational modification, protein turnover, chaperones] 15
COG5148 RPN10 26S proteasome regulatory complex, subunit RPN10/PSMD4 [Posttranslational modification, protein turnover, chaperones] 14
COG1047 SlpA FKBP-type peptidyl-prolyl cis-trans isomerases 2 [Posttranslational modification, protein turnover, chaperones] 14
COG1651 DsbG Protein-disulfide isomerase [Posttranslational modification, protein turnover, chaperones] 14
COG5536 BET4 Protein prenyltransferase, alpha subunit [Posttranslational modification, protein turnover, chaperones] 13
COG1180 PflA Pyruvate-formate lyase-activating enzyme [Posttranslational modification, protein turnover, chaperones] 13
COG5110 RPN1 26S proteasome regulatory complex component [Posttranslational modification, protein turnover, chaperones] 12
COG0544 Tig FKBP-type peptidyl-prolyl cis-trans isomerase (trigger factor) [Posttranslational modification, protein turnover, chaperones] 12
COG5193 LHP1 La protein, small RNA-binding pol III transcript stabilizing protein and related La-motif-containing proteins involved in translation [Posttranslational modification, protein turnover, chaperones / Translation, ribosomal structure and biogenesis] 12
COG0533 QRI7 Metal-dependent proteases with possible chaperone activity [Posttranslational modification, protein turnover, chaperones] 12
COG2386 CcmB ABC-type transport system involved in cytochrome c biogenesis, permease component [Posttranslational modification, protein turnover, chaperones] 11
COG5071 RPN5 26S proteasome regulatory complex component [Posttranslational modification, protein turnover, chaperones] 11
COG5029 CAL1 Prenyltransferase, beta subunit [Posttranslational modification, protein turnover, chaperones] 11
COG4826 Serine protease inhibitor [Posttranslational modification, protein turnover, chaperones] 10
COG0602 NrdG Organic radical activating enzymes [Posttranslational modification, protein turnover, chaperones] 10
COG0826 Collagenase and related proteases [Posttranslational modification, protein turnover, chaperones] 9
COG4745 Predicted membrane-bound mannosyltransferase [Posttranslational modification, protein turnover, chaperones] 8
COG5596 TIM22 Mitochondrial import inner membrane translocase, subunit TIM22 [Posttranslational modification, protein turnover, chaperones] 8
COG4346 Predicted membrane-bound dolichyl-phosphate-mannose-protein mannosyltransferase [Posttranslational modification, protein turnover, chaperones] 8
COG0068 HypF Hydrogenase maturation factor [Posttranslational modification, protein turnover, chaperones] 7
COG5549 Predicted Zn-dependent protease [Posttranslational modification, protein turnover, chaperones] 7
COG5113 UFD2 Ubiquitin fusion degradation protein 2 [Posttranslational modification, protein turnover, chaperones] 7
COG5156 DOC1 Anaphase-promoting complex (APC), subunit 10 [Cell division and chromosome partitioning / Posttranslational modification, protein turnover, chaperones] 7
COG2377 Predicted molecular chaperone distantly related to HSP70-fold metalloproteases [Posttranslational modification, protein turnover, chaperones] 6
COG3531 Predicted protein-disulfide isomerase [Posttranslational modification, protein turnover, chaperones] 6
COG4934 Predicted protease [Posttranslational modification, protein turnover, chaperones] 6
COG0316 sufA Fe-S cluster assembly scaffold protein [Posttranslational modification, protein turnover, chaperones] 6
COG4935 Regulatory P domain of the subtilisin-like proprotein convertases and other proteases [Posttranslational modification, protein turnover, chaperones] 6
COG5541 RET3 Vesicle coat complex COPI, zeta subunit [Posttranslational modification, protein turnover, chaperones] 6
COG0501 HtpX Zn-dependent protease with chaperone function [Posttranslational modification, protein turnover, chaperones] 5
COG0109 CyoE Polyprenyltransferase (cytochrome oxidase assembly factor) [Posttranslational modification, protein turnover, chaperones] 5
COG1370 Prefoldin, molecular chaperone implicated in de novo protein folding, alpha subunit [Posttranslational modification, protein turnover, chaperones] 5
COG0309 HypE Hydrogenase maturation factor [Posttranslational modification, protein turnover, chaperones] 5
COG3751 EGL-9 Predicted proline hydroxylase [Posttranslational modification, protein turnover, chaperones] 5
COG1214 Inactive homolog of metal-dependent proteases, putative molecular chaperone [Posttranslational modification, protein turnover, chaperones] 4
COG5206 GPI8 Glycosylphosphatidylinositol transamidase (GPIT), subunit GPI8 [Posttranslational modification, protein turnover, chaperones] 4
COG2020 STE14 Putative protein-S-isoprenylcysteine methyltransferase [Posttranslational modification, protein turnover, chaperones] 4
COG5160 ULP1 Protease, Ulp1 family [Posttranslational modification, protein turnover, chaperones] 4
COG2192 Predicted carbamoyl transferase, NodU family [Posttranslational modification, protein turnover, chaperones] 4
COG5234 CIN1 Beta-tubulin folding cofactor D [Posttranslational modification, protein turnover, chaperones / Cytoskeleton] 4
COG0234 GroS Co-chaperonin GroES (HSP10) [Posttranslational modification, protein turnover, chaperones] 4
COG4930 Predicted ATP-dependent Lon-type protease [Posttranslational modification, protein turnover, chaperones] 4
COG1612 CtaA Uncharacterized protein required for cytochrome oxidase assembly [Posttranslational modification, protein turnover, chaperones] 4
COG0576 GrpE Molecular chaperone GrpE (heat shock protein) [Posttranslational modification, protein turnover, chaperones] 4
COG5387 Chaperone required for the assembly of the mitochondrial F1-ATPase [Posttranslational modification, protein turnover, chaperones] 3
COG3175 COX11 Cytochrome oxidase assembly factor [Posttranslational modification, protein turnover, chaperones] 3
COG0225 MsrA Peptide methionine sulfoxide reductase [Posttranslational modification, protein turnover, chaperones] 3
COG0760 SurA Parvulin-like peptidyl-prolyl isomerase [Posttranslational modification, protein turnover, chaperones] 3
COG5494 Predicted thioredoxin/glutaredoxin [Posttranslational modification, protein turnover, chaperones] 3
COG1973 HypE Hydrogenase maturation factor [Posttranslational modification, protein turnover, chaperones] 3
COG5140 UFD1 Ubiquitin fusion-degradation protein [Posttranslational modification, protein turnover, chaperones] 3
COG5054 ERV1 Mitochondrial sulfhydryl oxidase involved in the biogenesis of cytosolic Fe/S proteins [Posttranslational modification, protein turnover, chaperones] 3
COG4959 TraF Type IV secretory pathway, protease TraF [Posttranslational modification, protein turnover, chaperones / Intracellular trafficking and secretion] 2
COG1899 DYS1 Deoxyhypusine synthase [Posttranslational modification, protein turnover, chaperones] 2
COG2844 GlnD UTP:GlnB (protein PII) uridylyltransferase [Posttranslational modification, protein turnover, chaperones] 2
COG5061 ERO1 Oxidoreductin, endoplasmic reticulum membrane-associated protein involved in disulfide bond formation [Posttranslational modification, protein turnover, chaperones / Intracellular trafficking and secretion] 2
COG3278 CcoN Cbb3-type cytochrome oxidase, subunit 1 [Posttranslational modification, protein turnover, chaperones] 2
COG5131 URM1 Ubiquitin-like protein [Posttranslational modification, protein turnover, chaperones] 2
COG0694 Thioredoxin-like proteins and domains [Posttranslational modification, protein turnover, chaperones] 2
COG2935 Putative arginyl-tRNA:protein arginylyltransferase [Posttranslational modification, protein turnover, chaperones] 2
COG0229 Conserved domain frequently associated with peptide methionine sulfoxide reductase [Posttranslational modification, protein turnover, chaperones] 2
COG1397 DraG ADP-ribosylglycohydrolase [Posttranslational modification, protein turnover, chaperones] 1
COG3088 CcmH Uncharacterized protein involved in biosynthesis of c-type cytochromes [Posttranslational modification, protein turnover, chaperones] 1
COG2039 Pcp Pyrrolidone-carboxylate peptidase (N-terminal pyroglutamyl peptidase) [Posttranslational modification, protein turnover, chaperones] 1
COG5580 Activator of HSP90 ATPase [Posttranslational modification, protein turnover, chaperones] 1
COG5046 MAF1 Protein involved in Mod5 protein sorting [Posttranslational modification, protein turnover, chaperones] 1
COG1261 FlgA Flagellar basal body P-ring biosynthesis protein [Cell motility and secretion / Posttranslational modification, protein turnover, chaperones] 1