1KCZ

Crystal Structure of beta-methylaspartase from Clostridium tetanomorphum. Mg-complex.

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Protein Modification Annotation
Structure Motif: Primary M-CSA Annotation

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1kcza1	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	Enolase C-terminal domain-like	D-glucarate dehydratase-like	beta-Methylaspartase	(Clostridium tetanomorphum ) [TaxId: 1553 ],	SCOPe (2.08)
A	d1kcza2	Alpha and beta proteins (a+b)	Enolase N-terminal domain-like	Enolase N-terminal domain-like	Enolase N-terminal domain-like	beta-Methylaspartase	(Clostridium tetanomorphum ) [TaxId: 1553 ],	SCOPe (2.08)
B	d1kczb1	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	Enolase C-terminal domain-like	D-glucarate dehydratase-like	beta-Methylaspartase	(Clostridium tetanomorphum ) [TaxId: 1553 ],	SCOPe (2.08)
B	d1kczb2	Alpha and beta proteins (a+b)	Enolase N-terminal domain-like	Enolase N-terminal domain-like	Enolase N-terminal domain-like	beta-Methylaspartase	(Clostridium tetanomorphum ) [TaxId: 1553 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	D-glucarate dehydratase-like	8025683	4003246	SCOP2 (2022-06-29)
A	SCOP2 Family	Enolase N-terminal domain-like	8025686	4001209	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Enolase C-terminal domain-like	8038062	3000476	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Enolase N-terminal domain-like	8038065	3001064	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Enolase N-terminal domain-like	8038065	3001064	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Enolase C-terminal domain-like	8038062	3000476	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	MAAL_N	e1kczA1	A: a+b two layers	X: Enolase-N/ribosomal protein	H: Enolase N-terminal domain-like (From Topology)	T: Enolase N-terminal domain-like	F: MAAL_N	ECOD (1.6)
A	MAAL_C	e1kczA2	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: MAAL_C	ECOD (1.6)
B	MAAL_N	e1kczB1	A: a+b two layers	X: Enolase-N/ribosomal protein	H: Enolase N-terminal domain-like (From Topology)	T: Enolase N-terminal domain-like	F: MAAL_N	ECOD (1.6)
B	MAAL_C	e1kczB2	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: MAAL_C	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.390.10	Alpha Beta	2-Layer Sandwich	Enolase-like	domain 1	CATH (4.3.0)
A	3.20.20.120	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Enolase-like C-terminal domain	CATH (4.3.0)
B	3.30.390.10	Alpha Beta	2-Layer Sandwich	Enolase-like	domain 1	CATH (4.3.0)
B	3.20.20.120	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Enolase-like C-terminal domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF05034	Methylaspartate ammonia-lyase N-terminus (MAAL_N)	Methylaspartate ammonia-lyase N-terminus	-	Family
A, B	PF07476	Methylaspartate ammonia-lyase C-terminus (MAAL_C)	Methylaspartate ammonia-lyase C-terminus	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: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

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	beta-methylaspartase	vitamin binding binding cobalamin binding tetrapyrrole binding heterocyclic compound binding small molecule binding methylaspartate ammonia-lyase activity lyase activity ammonia-lyase activity catalytic activity carbon-nitrogen lyase activity cation binding ion binding metal ion binding	catabolic process oxoacid metabolic process glutamine family amino acid catabolic process amino acid metabolic process organic acid metabolic process dicarboxylic acid catabolic process organic acid catabolic process alpha-amino acid metabolic process glutamine family amino acid metabolic process cellular catabolic process carboxylic acid catabolic process glutamate metabolic process small molecule metabolic process amino acid catabolic process catabolic process oxoacid metabolic process glutamine family amino acid catabolic process amino acid metabolic process organic acid metabolic process dicarboxylic acid catabolic process organic acid catabolic process alpha-amino acid metabolic process glutamine family amino acid metabolic process cellular catabolic process carboxylic acid catabolic process glutamate metabolic process small molecule metabolic process amino acid catabolic process glutamate catabolic process dicarboxylic acid metabolic process carboxylic acid metabolic process L-amino acid catabolic process primary metabolic process glutamate catabolic process via L-citramalate L-amino acid metabolic process proteinogenic amino acid metabolic process alpha-amino acid catabolic process proteinogenic amino acid catabolic process metabolic process cellular process small molecule catabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR006395	Methylaspartate ammonia-lyase	Family
A, B	IPR022662	Methylaspartate ammonia-lyase, C-terminal	Domain
A, B	IPR029017	Enolase-like, N-terminal	Homologous Superfamily
A, B	IPR022665	Methylaspartate ammonia-lyase, N-terminal	Domain
A, B	IPR036849	Enolase-like, C-terminal domain superfamily	Homologous Superfamily

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
A, B	OCS	Parent Component: CYS RESID: AA0556 PSI-MOD : L-cysteic acid (L-cysteine sulfonic acid) MOD:00460

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

Chains	Enzyme Name	Description	Catalytic Residues
A	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 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 4.3.1.2 (PDB Primary Data) Search M-CSA Motif + EC 4.3.1.2

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.