Annotations: 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
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	OsmC	e1kczA1	A: a/b three-layered sandwiches	X: ETN0001 domain-like	H: ETN0001 domain-like	T: Mss4-like	F: OsmC	ECOD (v294.1)
A	Meth_synt_2	e1kczA2	A: a/b three-layered sandwiches	X: HTH	H: HTH	T: winged helix domain	F: Meth_synt_2	ECOD (v294.1)
B	OsmC	e1kczB1	A: a/b three-layered sandwiches	X: ETN0001 domain-like	H: ETN0001 domain-like	T: Mss4-like	F: OsmC	ECOD (v294.1)
B	Meth_synt_2	e1kczB2	A: a/b three-layered sandwiches	X: HTH	H: HTH	T: winged helix domain	F: Meth_synt_2	ECOD (v294.1)

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)

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	-	-

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 : AA0556 : 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

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