Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2 FamilyD-glucarate dehydratase-like 8025683 4003246 SCOP2 (2022-06-29)
ASCOP2 FamilyEnolase N-terminal domain-like 8025686 4001209 SCOP2 (2022-06-29)
ASCOP2 SuperfamilyEnolase C-terminal domain-like 8038062 3000476 SCOP2 (2022-06-29)
ASCOP2 SuperfamilyEnolase N-terminal domain-like 8038065 3001064 SCOP2 (2022-06-29)
BSCOP2B SuperfamilyEnolase N-terminal domain-like 8038065 3001064 SCOP2B (2022-06-29)
BSCOP2B SuperfamilyEnolase C-terminal domain-like 8038062 3000476 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AMAAL_Ne1kczA1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: MAAL_NECOD (1.6)
AMAAL_Ce1kczA2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: MAAL_CECOD (1.6)
BMAAL_Ne1kczB1 A: a+b two layersX: Enolase-N/ribosomal proteinH: Enolase N-terminal domain-like (From Topology)T: Enolase N-terminal domain-likeF: MAAL_NECOD (1.6)
BMAAL_Ce1kczB2 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: MAAL_CECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
A3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)
B3.30.390.10 Alpha Beta 2-Layer Sandwich Enolase-like domain 1CATH (4.3.0)
B3.20.20.120 Alpha Beta Alpha-Beta Barrel TIM Barrel Enolase-like C-terminal domainCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A, B
PF05034Methylaspartate ammonia-lyase N-terminus (MAAL_N)Methylaspartate ammonia-lyase N-terminus- Family
A, B
PF07476Methylaspartate ammonia-lyase C-terminus (MAAL_C)Methylaspartate ammonia-lyase C-terminusMethylaspartate ammonia-lyase EC:4.3.1.2 catalyses the second step of fermentation of glutamate. It is a homodimer. This family represents the C-terminal region of Methylaspartate ammonia-lyase and contains a TIM barrel fold similar to the Pfam:PF011 ...Methylaspartate ammonia-lyase EC:4.3.1.2 catalyses the second step of fermentation of glutamate. It is a homodimer. This family represents the C-terminal region of Methylaspartate ammonia-lyase and contains a TIM barrel fold similar to the Pfam:PF01188. This family represents the catalytic domain and contains a metal binding site [2].
Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A, B
beta-methylaspartase -

Protein Modification Annotation

Modified Residue(s)
ChainResidue(s)Description
A, B
OCS Parent Component: CYS

RESIDAA0556

PSI-MOD :  L-cysteic acid (L-cysteine sulfonic acid) MOD:00460

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

ChainsEnzyme NameDescriptionCatalytic Residues
methylaspartate ammonia-lyase  M-CSA #468

Methylasparate ammonium lyase (MAL) is involved in the methylaspartate cycle and catalyses the formation of the alpha,beta-unsaturated bond by the reversible anti elimination of ammonia from L-threo-beta-methylaspartate (L-threo-(2S,3S)-3-methylaspartate) to give mesaconate. It can also use L-erythro-beta-methylaspartate (L-erythro-(2S,3R)-3-methylaspartate), L-aspartate, fumarate and ethylfumarate as substrates. It will also catalyse the stereo- and regioselective addition of ammonia to several derivatives of mesaconic acid to give a limited number of homochiral substituted aspartic acids. The structure of MAL is similar to that of members of the enolase superfamily, which all catalyse removal of a proton alpha to a carboxylic acid as the first step in their mechanism.

Defined by 7 residues: GLN:A-172HIS:A-194ASP:A-238GLU:A-273ASP:A-307GLN:A-329LYS:A-331
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