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(-) Description

Title :  STRUCTURE OF THE CODH COMPONENT OF THE M. BARKERI ACDS COMPLEX
 
Authors :  W. Gong, B. Hao, Z. Wei, D. J. Ferguson Jr. , T. Tallant, J. A. Krzycki, M.
Date :  01 Mar 08  (Deposition) - 22 Jul 08  (Release) - 07 Mar 12  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  2.00
Chains :  Asym. Unit :  A,G
Biol. Unit 1:  A,G  (2x)
Biol. Unit 2:  A,G  (1x)
Keywords :  Methanomicrobia, Iron-Nikel-Sulfur, 4Fe-Ni-4S, Oxidoreductase (Keyword Search: [Gene Ontology, PubMed, Web (Google))
 
Reference :  W. Gong, B. Hao, Z. Wei, D. J. Ferguson Jr. , T. Tallant, J. A. Krzycki, M. K. Chan
Structure Of The Alpha2 Epsilon2 Ni-Dependent Co Dehydrogenase Component Of The Methanosarcina Barkeri Acetyl-Coa Decarboxylase/Synthase Complex
Proc. Natl. Acad. Sci. Usa V. 105 9558 2008
PubMed-ID: 18621675  |  Reference-DOI: 10.1073/PNAS.0800415105

(-) Compounds

Molecule 1 - ACETYL-COA DECARBOXYLASE/SYNTHASE ALPHA SUBUNIT
    ChainsA
    EC Number1.2.99.2
    Organism ScientificMETHANOSARCINA BARKERI
    Organism Taxid2208
    Other DetailsGENE CDHA
    StrainMS (DSM800)
 
Molecule 2 - ACETYL-COA DECARBOXYLASE/SYNTHASE EPSILON SUBUNIT
    ChainsG
    EC Number1.2.99.2
    Organism ScientificMETHANOSARCINA BARKERI
    Organism Taxid2208
    Other DetailsGENE CDHB
    StrainMS (DSM800)

 Structural Features

(-) Chains, Units

  12
Asymmetric Unit AG
Biological Unit 1 (2x)AG
Biological Unit 2 (1x)AG

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (7, 22)

Asymmetric Unit (7, 22)
No.NameCountTypeFull Name
1ACY11Ligand/IonACETIC ACID
2CMO1Ligand/IonCARBON MONOXIDE
3FE1Ligand/IonFE (III) ION
4GOL3Ligand/IonGLYCEROL
5PEG1Ligand/IonDI(HYDROXYETHYL)ETHER
6SF44Ligand/IonIRON/SULFUR CLUSTER
7WCC1Ligand/IonFE(3)-NI(1)-S(4) CLUSTER
Biological Unit 1 (6, 42)
No.NameCountTypeFull Name
1ACY22Ligand/IonACETIC ACID
2CMO2Ligand/IonCARBON MONOXIDE
3FE-1Ligand/IonFE (III) ION
4GOL6Ligand/IonGLYCEROL
5PEG2Ligand/IonDI(HYDROXYETHYL)ETHER
6SF48Ligand/IonIRON/SULFUR CLUSTER
7WCC2Ligand/IonFE(3)-NI(1)-S(4) CLUSTER
Biological Unit 2 (6, 21)
No.NameCountTypeFull Name
1ACY11Ligand/IonACETIC ACID
2CMO1Ligand/IonCARBON MONOXIDE
3FE-1Ligand/IonFE (III) ION
4GOL3Ligand/IonGLYCEROL
5PEG1Ligand/IonDI(HYDROXYETHYL)ETHER
6SF44Ligand/IonIRON/SULFUR CLUSTER
7WCC1Ligand/IonFE(3)-NI(1)-S(4) CLUSTER

(-) Sites  (22, 22)

Asymmetric Unit (22, 22)
No.NameEvidenceResiduesDescription
01AC1SOFTWARECYS A:73 , GLN A:75 , CYS A:77BINDING SITE FOR RESIDUE SF4 A 809
02AC2SOFTWARECYS A:76 , TYR A:78 , CYS A:79 , TYR A:81 , GLY A:82 , CYS A:84 , GLY A:92 , CYS A:94 , ARG A:104 , ALA A:184BINDING SITE FOR RESIDUE SF4 A 810
03AC3SOFTWAREHIS A:250 , CYS A:278 , CYS A:587 , WCC A:811 , HOH A:827BINDING SITE FOR RESIDUE FE A 808
04AC4SOFTWAREHIS A:250 , CYS A:277 , CYS A:323 , GLY A:522 , CYS A:523 , PRO A:524 , CYS A:552 , CYS A:587 , PHE A:634 , SER A:635 , LYS A:637 , FE A:808 , CMO A:812 , HOH A:827BINDING SITE FOR RESIDUE WCC A 811
05AC5SOFTWAREHIS A:117 , CYS A:587 , LYS A:637 , ILE A:641 , WCC A:811 , HOH A:827BINDING SITE FOR RESIDUE CMO A 812
06AC6SOFTWARECYS A:427 , PRO A:428 , ILE A:433 , CYS A:455 , ILE A:456 , CYS A:458 , ARG A:459 , CYS A:461BINDING SITE FOR RESIDUE SF4 A 813
07AC7SOFTWARECYS A:417 , ALA A:418 , ASP A:419 , CYS A:420 , GLY A:421 , CYS A:423 , MET A:437 , CYS A:465BINDING SITE FOR RESIDUE SF4 A 814
08AC8SOFTWAREARG A:91 , GLU A:331 , LYS A:334 , ARG A:459BINDING SITE FOR RESIDUE ACY A 815
09AC9SOFTWARETHR A:406 , ASP A:407 , LYS A:477BINDING SITE FOR RESIDUE ACY A 816
10BC1SOFTWAREARG A:571BINDING SITE FOR RESIDUE ACY A 817
11BC2SOFTWAREMET A:708 , LYS A:711 , TRP A:730 , HIS A:734 , HOH A:951BINDING SITE FOR RESIDUE ACY A 818
12BC3SOFTWAREGLU A:430 , HOH A:1017 , HOH A:1117 , LYS G:117 , ARG G:141BINDING SITE FOR RESIDUE ACY A 819
13BC4SOFTWAREARG A:353BINDING SITE FOR RESIDUE ACY A 820
14BC5SOFTWAREPRO A:67 , ILE A:69 , LYS A:99 , HOH A:1216 , ALA G:127 , PHE G:131BINDING SITE FOR RESIDUE ACY A 821
15BC6SOFTWARELYS A:735 , THR A:760 , HOH A:1047BINDING SITE FOR RESIDUE ACY A 822
16BC7SOFTWARELEU A:108 , ARG A:109 , THR A:112 , VAL A:182 , GLN A:636BINDING SITE FOR RESIDUE ACY A 823
17BC8SOFTWAREASP A:290 , ARG A:291 , ARG A:292 , ARG A:607 , GLN A:796 , HOH A:1027BINDING SITE FOR RESIDUE ACY A 824
18BC9SOFTWAREARG A:607 , ARG A:623 , GLN A:796 , PRO A:797 , HOH A:999 , HOH A:1159BINDING SITE FOR RESIDUE GOL A 825
19CC1SOFTWAREMET A:259 , LEU A:283 , TYR A:286 , GLU A:288 , PRO A:293 , PRO A:294 , TYR A:295 , ALA A:296 , HOH A:929 , HOH A:959BINDING SITE FOR RESIDUE GOL A 826
20CC2SOFTWARETHR A:669 , GLU A:744 , HOH A:1177 , TRP G:99BINDING SITE FOR RESIDUE ACY G 171
21CC3SOFTWARELEU A:424 , LEU A:425 , HOH A:1017 , LYS G:118 , ARG G:141 , GLY G:142 , ASN G:153 , HOH G:216 , HOH G:247BINDING SITE FOR RESIDUE GOL G 172
22CC4SOFTWARELEU G:134 , THR G:136 , ASN G:146 , THR G:148 , HOH G:259BINDING SITE FOR RESIDUE PEG G 173

(-) SS Bonds  (0, 0)

(no "SS Bond" information available for 3CF4)

(-) Cis Peptide Bonds  (2, 2)

Asymmetric Unit
No.Residues
1Gly A:82 -Pro A:83
2Ala A:691 -Pro A:692

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 3CF4)

(-) PROSITE Motifs  (2, 3)

Asymmetric Unit (2, 3)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
14FE4S_FER_2PS51379 4Fe-4S ferredoxin-type iron-sulfur binding domain profile.ACDA1_METBF407-436
446-475
  2A:407-436
A:446-475
24FE4S_FER_1PS00198 4Fe-4S ferredoxin-type iron-sulfur binding region signature.ACDA1_METBF417-428  1A:417-428
Biological Unit 1 (2, 6)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
14FE4S_FER_2PS51379 4Fe-4S ferredoxin-type iron-sulfur binding domain profile.ACDA1_METBF407-436
446-475
  4A:407-436
A:446-475
24FE4S_FER_1PS00198 4Fe-4S ferredoxin-type iron-sulfur binding region signature.ACDA1_METBF417-428  2A:417-428
Biological Unit 2 (2, 3)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
14FE4S_FER_2PS51379 4Fe-4S ferredoxin-type iron-sulfur binding domain profile.ACDA1_METBF407-436
446-475
  2A:407-436
A:446-475
24FE4S_FER_1PS00198 4Fe-4S ferredoxin-type iron-sulfur binding region signature.ACDA1_METBF417-428  1A:417-428

(-) Exons   (0, 0)

(no "Exon" information available for 3CF4)

(-) Sequences/Alignments

Asymmetric Unit
   Reformat: Number of residues per line =  ('0' or empty: single-line sequence representation)
  Number of residues per labelling interval =   
  UniProt sequence: complete  aligned part    
   Show mapping: SCOP domains CATH domains Pfam domains Secondary structure (by author)
SAPs(SNPs) PROSITE motifs Exons
(details for a mapped element are shown in a popup box when the mouse pointer rests over it)
Chain A from PDB  Type:PROTEIN  Length:766
 aligned with ACDA1_METBF | Q46G04 from UniProtKB/Swiss-Prot  Length:806

    Alignment length:766
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        742                                                               
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      741 |                                                               
                                    50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410       420       430       440       450       460       470       480       490       500       510       520       530       540       550       560       570       580       590       600       610       620       630       640       650       660       670       680       690       700       710       720       730       740| |    749       759       769       779       789       799      
          ACDA1_METBF    41 NAGPTLFAGLESYRDDWNFKLLDRYEPVITPMCDQCCYCTYGPCDLSGNKRGACGIDMLGHNGREFFLRVITGTACHAAHGRHLLDHLIETFGEDLPLNLGQSNVLTPNITISTGLSPKTLGEVKPAMEYVEEQLTQLLATVHAGQESAEIDYDSKALFSGSLDHVGMEISDIVQVTAYDFPRADPEAPLIEIGMGTIDKSKPFLCVIGHNVAGVTYMMDYMEDHDLTDKMEIAGLCCTAIDLTRYKEADRRPPYAKVIGSMSKELKVIRSGMPDVIVVDEQCVRGDIVPEAQKLMIPVIASNPKIMYGLPNRTDADVDETIEELRSGKIPGCVMLDYDKLGEICIRLTMEMAPIRDASGITAIPTDEEFTNWVMKCADCGACMIACPEELDIPEAMGFAKEGDYSYLDILHDQCIGCRRCEQVCKKEIPILNIIEKAAQKQISEEKGLMRAGRGQVSDAEIRAEGLNLVMGTTPGIIAIIGCPNYPEGTKDVYYIAEEFLKRNFIVVTTGCGAMDIGMFKDEDGKTLYERFPGGFECGGLANIGSCVSNAHITGAAEKVAAIFAQRTLEGNLAEIGDYVLNRVGACGLAWGAFSQKASSIGTGCNILGIPAVLGPHSSKYRRALIAKNYEEDKWKVYDARNGQEMAIPPAPEFLLTTAETWQEAIPMMAKACIRPSDNNMGRSIKLTHWMELHKKYLGSK-PEDWWKFVRNEADLPLATREALLKELEKEHGWEIDWKRKKVISGPKIKFDVSAQPTNLKRLCKE 805
               SCOP domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ................hhhhhhhhheeee.....ee.......ee...........hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.............hhhhhhhhh.....hhhhhhhhhhhhhhhhhhhhh.......hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh..........eeeehhhhh.....eeeee...hhhhhhhhhhhhhh......eeeeehhhhhhhh............eeeehhhhhhhhhhhh...eeee.......hhhhhhhhh...eee...............hhhhhhhhhhh....eee..hhhhhhhhhhhhhhhhhhhhhhh......hhhhhhhhhhhh...hhhhhhh....hhhhhhhhhhh..hhhhhhhhhhh...hhhhhhh....hhhhhhhhhhhhhhhh..eeee......hhhhhhhhhhhhhhh....eeee..........hhhhhhhhhhhhh..eeeeehhhhhhhh........hhhhhh........eeeeehhhhhhhhhhhhhhhhhhh.......hhhhhhhhhhhhh.eeeee....hhhhhhhhhhhhhh...eee.hhhhhh.eeee....hhhh.eeee.....eee......eeeee..hhhhhhhhhhhhh.....hhhhhhhhhhhhhhhhhhhh......hhhhhh.hhhhh...hhhhhhhhhhhhhh.eee....eeee...........ee.hhhhh.. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------4FE4S_FER_2  PDB: A:407-436   ---------4FE4S_FER_2  PDB: A:446-475   ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE (1)
                PROSITE (2) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------4FE4S_FER_1 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ PROSITE (2)
                 Transcript ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3cf4 A  41 NAGPTLFPGLEGYRDDWNFKLLDRYEPVITPMCDQCCYCTYGPCDLSGNKRGACGIDMKGHNGREFFLRVITGTACHAAHGRHLLDHLIEKYGEDLPLTLGQSNVLTPNITISTGLSPKTLGEVKPAMEYVEEQLTQLLATVHAGQESAEIDYDSKALFSGSLDHVGMEISDIVQVAAYDFPKADPEAPLVEIGMGTIDKSKPFLCVIGHNVAGVTYMMDYMEDNNLTDKMEIAGLCCTAIDLTRYKEADRRPPYAKVIGSMSKELKVIRSGMPDVIVVDEQCVRGDIVPEAQKLKIPVIASNPKIMYGLPNRTDADVDETMEELKSGKIPGCVMLDYDKLGELCVRLTMEMAPIRDAAGITALPTDEELVNMVAKCADCGACLLACPEEIDIPEAMGFAKKGDFSYFEEIHDTCIGCRRCEQVCKKEIPILNVIEKIAQKQIAEEKGLMRAGRGQVSDAEIRAEGLNLVMGTTPGIIAIIGCPNYAGGTKDVYYIAEEFLKRNFIVVTTGCGAMDIGMFKDADGKTLYERFPGGFQCGGLANIGSCVSNAHITGAAEKVAAIFAQRTLEGNLAEIGDYILNRVGACGLAWGAFSQKASSIGTGCNIFGIPAVLGPHSSKYRRALIAKTYEEDKWKVYDARNGQEMPIPPAPEFLLTTAETWQEAIPMMAKACIRPSDNSMGRAIKLTHWMELHKKYLGGKEPEDWWKFVRTEADLPLATREALLKELEKEHGWEIDWKRKKIISGPKIKFDVSAQPTNLKRLCKE 806
                                    50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320       330       340       350       360       370       380       390       400       410       420       430       440       450       460       470       480       490       500       510       520       530       540       550       560       570       580       590       600       610       620       630       640       650       660       670       680       690       700       710       720       730       740       750       760       770       780       790       800      

Chain G from PDB  Type:PROTEIN  Length:169
 aligned with ACDE1_METBF | Q46G05 from UniProtKB/Swiss-Prot  Length:170

    Alignment length:169
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161         
          ACDE1_METBF     2 VDTTKNTKLFTSYGVSTSRTVSPEMAAKLISKAKRPLLMVGTLTLEPEILDRVVKISKAANIPIAATGSSMASLVDKDVDAKYINAHMLGFYLTDPKWPGLDGNGNYDMVIAIGFKKYYINQVLSAAKNFSNLKTIAIERGYIQNATMSFGNLSKADYYAALDELINAL 170
               SCOP domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SCOP domains
               CATH domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..................ee.hhhhhhhhhhhh..eeeee.....hhhhhhhhhhhhhhhh..eee...hhhhhh.....eee.hhhhhhhhh...............eeeee..hhhhhhhhhhhhhhhh...eee..........ee....hhhhhhhhhhhhhhh. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 3cf4 G   2 VDTTKNTKLFTSYGVNTSKAVSPEMAAKIISKAKRPLLMVGTLALDPELLDRVVKISKAANIPIAATGSSLAVLADKDVDAKYINAHMLGFYLTDPKWPGLDGNGNYDMIITIGFKKFYINQVLSAAKNFSNLKTIAIERGYIQNATMSFGNLSKADHYAALDELINAL 170
                                    11        21        31        41        51        61        71        81        91       101       111       121       131       141       151       161         

   Legend:   → Mismatch (orange background)
  - → Gap (green background, '-', border residues have a numbering label)
    → Modified Residue (blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
  x → Chemical Group (purple background, 'x', labelled with number + name, e.g. ACE or NH2)
  extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '|'

 Classification and Annotation

(-) SCOP Domains  (0, 0)

(no "SCOP Domain" information available for 3CF4)

(-) CATH Domains  (0, 0)

(no "CATH Domain" information available for 3CF4)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 3CF4)

(-) Gene Ontology  (12, 14)

Asymmetric Unit(hide GO term definitions)
Chain A   (ACDA1_METBF | Q46G04)
molecular function
    GO:0051539    4 iron, 4 sulfur cluster binding    Interacting selectively and non-covalently with a 4 iron, 4 sulfur (4Fe-4S) cluster; this cluster consists of four iron atoms, with the inorganic sulfur atoms found between the irons and acting as bridging ligands.
    GO:0018492    carbon-monoxide dehydrogenase (acceptor) activity    Catalysis of the reaction: CO + H2O + acceptor = CO2 + reduced acceptor.
    GO:0003824    catalytic activity    Catalysis of a biochemical reaction at physiological temperatures. In biologically catalyzed reactions, the reactants are known as substrates, and the catalysts are naturally occurring macromolecular substances known as enzymes. Enzymes possess specific binding sites for substrates, and are usually composed wholly or largely of protein, but RNA that has catalytic activity (ribozyme) is often also regarded as enzymatic.
    GO:0005506    iron ion binding    Interacting selectively and non-covalently with iron (Fe) ions.
    GO:0051536    iron-sulfur cluster binding    Interacting selectively and non-covalently with an iron-sulfur cluster, a combination of iron and sulfur atoms.
    GO:0046872    metal ion binding    Interacting selectively and non-covalently with any metal ion.
    GO:0016151    nickel cation binding    Interacting selectively and non-covalently with nickel (Ni) cations.
    GO:0016491    oxidoreductase activity    Catalysis of an oxidation-reduction (redox) reaction, a reversible chemical reaction in which the oxidation state of an atom or atoms within a molecule is altered. One substrate acts as a hydrogen or electron donor and becomes oxidized, while the other acts as hydrogen or electron acceptor and becomes reduced.
biological process
    GO:0006084    acetyl-CoA metabolic process    The chemical reactions and pathways involving acetyl-CoA, a derivative of coenzyme A in which the sulfhydryl group is acetylated; it is a metabolite derived from several pathways (e.g. glycolysis, fatty acid oxidation, amino-acid catabolism) and is further metabolized by the tricarboxylic acid cycle. It is a key intermediate in lipid and terpenoid biosynthesis.
    GO:0015948    methanogenesis    The chemical reactions and pathways resulting in the formation of methane, a colorless, odorless, flammable gas with the formula CH4. It is the simplest of the alkanes.
    GO:0019385    methanogenesis, from acetate    The formation of methane, a colorless, odorless, flammable gas with the formula CH4, from other components, including acetate.
    GO:0055114    oxidation-reduction process    A metabolic process that results in the removal or addition of one or more electrons to or from a substance, with or without the concomitant removal or addition of a proton or protons.

Chain G   (ACDE1_METBF | Q46G05)
biological process
    GO:0015948    methanogenesis    The chemical reactions and pathways resulting in the formation of methane, a colorless, odorless, flammable gas with the formula CH4. It is the simplest of the alkanes.
    GO:0019385    methanogenesis, from acetate    The formation of methane, a colorless, odorless, flammable gas with the formula CH4, from other components, including acetate.

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