2IVB

SITE DIRECTED MUTAGENESIS OF KEY RESIDUES INVOLVED IN THE CATALYTIC MECHANISM OF CYANASE

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

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2ivba1	All alpha proteins	lambda repressor-like DNA-binding domains	lambda repressor-like DNA-binding domains	Cyanase N-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d2ivba2	Alpha and beta proteins (a+b)	Cyanase C-terminal domain	Cyanase C-terminal domain	Cyanase C-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
D	d2ivbd1	All alpha proteins	lambda repressor-like DNA-binding domains	lambda repressor-like DNA-binding domains	Cyanase N-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
D	d2ivbd2	Alpha and beta proteins (a+b)	Cyanase C-terminal domain	Cyanase C-terminal domain	Cyanase C-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
E	d2ivbe1	All alpha proteins	lambda repressor-like DNA-binding domains	lambda repressor-like DNA-binding domains	Cyanase N-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
E	d2ivbe2	Alpha and beta proteins (a+b)	Cyanase C-terminal domain	Cyanase C-terminal domain	Cyanase C-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
F	d2ivbf1	All alpha proteins	lambda repressor-like DNA-binding domains	lambda repressor-like DNA-binding domains	Cyanase N-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
F	d2ivbf2	Alpha and beta proteins (a+b)	Cyanase C-terminal domain	Cyanase C-terminal domain	Cyanase C-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
G	d2ivbg1	All alpha proteins	lambda repressor-like DNA-binding domains	lambda repressor-like DNA-binding domains	Cyanase N-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
G	d2ivbg2	Alpha and beta proteins (a+b)	Cyanase C-terminal domain	Cyanase C-terminal domain	Cyanase C-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
H	d2ivbh1	All alpha proteins	lambda repressor-like DNA-binding domains	lambda repressor-like DNA-binding domains	Cyanase N-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
H	d2ivbh2	Alpha and beta proteins (a+b)	Cyanase C-terminal domain	Cyanase C-terminal domain	Cyanase C-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
I	d2ivbi1	All alpha proteins	lambda repressor-like DNA-binding domains	lambda repressor-like DNA-binding domains	Cyanase N-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
I	d2ivbi2	Alpha and beta proteins (a+b)	Cyanase C-terminal domain	Cyanase C-terminal domain	Cyanase C-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
J	d2ivbj1	All alpha proteins	lambda repressor-like DNA-binding domains	lambda repressor-like DNA-binding domains	Cyanase N-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
J	d2ivbj2	Alpha and beta proteins (a+b)	Cyanase C-terminal domain	Cyanase C-terminal domain	Cyanase C-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
B	d2ivbb1	All alpha proteins	lambda repressor-like DNA-binding domains	lambda repressor-like DNA-binding domains	Cyanase N-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
B	d2ivbb2	Alpha and beta proteins (a+b)	Cyanase C-terminal domain	Cyanase C-terminal domain	Cyanase C-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
C	d2ivbc1	All alpha proteins	lambda repressor-like DNA-binding domains	lambda repressor-like DNA-binding domains	Cyanase N-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
C	d2ivbc2	Alpha and beta proteins (a+b)	Cyanase C-terminal domain	Cyanase C-terminal domain	Cyanase C-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	lambda C1 repressor DNA-binding domain-like	8037199	3000119	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Cyanase C-terminal domain	8035792	3001610	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	lambda C1 repressor DNA-binding domain-like	8037199	3000119	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Cyanase C-terminal domain	8035792	3001610	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	Cyanase C-terminal domain	8035792	3001610	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	lambda C1 repressor DNA-binding domain-like	8037199	3000119	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	lambda C1 repressor DNA-binding domain-like	8037199	3000119	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Cyanase C-terminal domain	8035792	3001610	SCOP2B (2022-06-29)
G	SCOP2B Superfamily	Cyanase C-terminal domain	8035792	3001610	SCOP2B (2022-06-29)
G	SCOP2B Superfamily	lambda C1 repressor DNA-binding domain-like	8037199	3000119	SCOP2B (2022-06-29)
H	SCOP2B Superfamily	lambda C1 repressor DNA-binding domain-like	8037199	3000119	SCOP2B (2022-06-29)
H	SCOP2B Superfamily	Cyanase C-terminal domain	8035792	3001610	SCOP2B (2022-06-29)
I	SCOP2B Superfamily	Cyanase C-terminal domain	8035792	3001610	SCOP2B (2022-06-29)
I	SCOP2B Superfamily	lambda C1 repressor DNA-binding domain-like	8037199	3000119	SCOP2B (2022-06-29)
J	SCOP2B Superfamily	lambda C1 repressor DNA-binding domain-like	8037199	3000119	SCOP2B (2022-06-29)
J	SCOP2B Superfamily	Cyanase C-terminal domain	8035792	3001610	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Cyanase C-terminal domain	8035792	3001610	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	lambda C1 repressor DNA-binding domain-like	8037199	3000119	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Cyanase C-terminal domain	8035792	3001610	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	lambda C1 repressor DNA-binding domain-like	8037199	3000119	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	PF21291	e2ivbA1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: PF21291	ECOD (1.6)
A	PF02560	e2ivbA2	A: a+b duplicates or obligate multimers	X: MinE-like	H: Cyanase C-terminal domain (From Topology)	T: Cyanase C-terminal domain	F: PF02560	ECOD (1.6)
D	PF21291	e2ivbD1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: PF21291	ECOD (1.6)
D	PF02560	e2ivbD2	A: a+b duplicates or obligate multimers	X: MinE-like	H: Cyanase C-terminal domain (From Topology)	T: Cyanase C-terminal domain	F: PF02560	ECOD (1.6)
E	PF21291	e2ivbE1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: PF21291	ECOD (1.6)
E	PF02560	e2ivbE2	A: a+b duplicates or obligate multimers	X: MinE-like	H: Cyanase C-terminal domain (From Topology)	T: Cyanase C-terminal domain	F: PF02560	ECOD (1.6)
F	PF21291	e2ivbF1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: PF21291	ECOD (1.6)
F	PF02560	e2ivbF2	A: a+b duplicates or obligate multimers	X: MinE-like	H: Cyanase C-terminal domain (From Topology)	T: Cyanase C-terminal domain	F: PF02560	ECOD (1.6)
G	PF21291	e2ivbG1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: PF21291	ECOD (1.6)
G	PF02560	e2ivbG2	A: a+b duplicates or obligate multimers	X: MinE-like	H: Cyanase C-terminal domain (From Topology)	T: Cyanase C-terminal domain	F: PF02560	ECOD (1.6)
H	PF21291	e2ivbH1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: PF21291	ECOD (1.6)
H	PF02560	e2ivbH2	A: a+b duplicates or obligate multimers	X: MinE-like	H: Cyanase C-terminal domain (From Topology)	T: Cyanase C-terminal domain	F: PF02560	ECOD (1.6)
I	PF21291	e2ivbI1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: PF21291	ECOD (1.6)
I	PF02560	e2ivbI2	A: a+b duplicates or obligate multimers	X: MinE-like	H: Cyanase C-terminal domain (From Topology)	T: Cyanase C-terminal domain	F: PF02560	ECOD (1.6)
J	PF21291	e2ivbJ1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: PF21291	ECOD (1.6)
J	PF02560	e2ivbJ2	A: a+b duplicates or obligate multimers	X: MinE-like	H: Cyanase C-terminal domain (From Topology)	T: Cyanase C-terminal domain	F: PF02560	ECOD (1.6)
B	PF21291	e2ivbB1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: PF21291	ECOD (1.6)
B	PF02560	e2ivbB2	A: a+b duplicates or obligate multimers	X: MinE-like	H: Cyanase C-terminal domain (From Topology)	T: Cyanase C-terminal domain	F: PF02560	ECOD (1.6)
C	PF21291	e2ivbC1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: PF21291	ECOD (1.6)
C	PF02560	e2ivbC2	A: a+b duplicates or obligate multimers	X: MinE-like	H: Cyanase C-terminal domain (From Topology)	T: Cyanase C-terminal domain	F: PF02560	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.260.40	Mainly Alpha	Orthogonal Bundle	434 Repressor (Amino-terminal Domain)	lambda repressor-like DNA-binding domains	CATH (4.3.0)
A	3.30.1160.10	Alpha Beta	2-Layer Sandwich	Cyanate Lyase	Chain: A, domain 2	CATH (4.3.0)
D	1.10.260.40	Mainly Alpha	Orthogonal Bundle	434 Repressor (Amino-terminal Domain)	lambda repressor-like DNA-binding domains	CATH (4.3.0)
D	3.30.1160.10	Alpha Beta	2-Layer Sandwich	Cyanate Lyase	Chain: A, domain 2	CATH (4.3.0)
E	1.10.260.40	Mainly Alpha	Orthogonal Bundle	434 Repressor (Amino-terminal Domain)	lambda repressor-like DNA-binding domains	CATH (4.3.0)
E	3.30.1160.10	Alpha Beta	2-Layer Sandwich	Cyanate Lyase	Chain: A, domain 2	CATH (4.3.0)
F	1.10.260.40	Mainly Alpha	Orthogonal Bundle	434 Repressor (Amino-terminal Domain)	lambda repressor-like DNA-binding domains	CATH (4.3.0)
F	3.30.1160.10	Alpha Beta	2-Layer Sandwich	Cyanate Lyase	Chain: A, domain 2	CATH (4.3.0)
G	1.10.260.40	Mainly Alpha	Orthogonal Bundle	434 Repressor (Amino-terminal Domain)	lambda repressor-like DNA-binding domains	CATH (4.3.0)
G	3.30.1160.10	Alpha Beta	2-Layer Sandwich	Cyanate Lyase	Chain: A, domain 2	CATH (4.3.0)
H	1.10.260.40	Mainly Alpha	Orthogonal Bundle	434 Repressor (Amino-terminal Domain)	lambda repressor-like DNA-binding domains	CATH (4.3.0)
H	3.30.1160.10	Alpha Beta	2-Layer Sandwich	Cyanate Lyase	Chain: A, domain 2	CATH (4.3.0)
I	1.10.260.40	Mainly Alpha	Orthogonal Bundle	434 Repressor (Amino-terminal Domain)	lambda repressor-like DNA-binding domains	CATH (4.3.0)
I	3.30.1160.10	Alpha Beta	2-Layer Sandwich	Cyanate Lyase	Chain: A, domain 2	CATH (4.3.0)
J	1.10.260.40	Mainly Alpha	Orthogonal Bundle	434 Repressor (Amino-terminal Domain)	lambda repressor-like DNA-binding domains	CATH (4.3.0)
J	3.30.1160.10	Alpha Beta	2-Layer Sandwich	Cyanate Lyase	Chain: A, domain 2	CATH (4.3.0)
B	1.10.260.40	Mainly Alpha	Orthogonal Bundle	434 Repressor (Amino-terminal Domain)	lambda repressor-like DNA-binding domains	CATH (4.3.0)
B	3.30.1160.10	Alpha Beta	2-Layer Sandwich	Cyanate Lyase	Chain: A, domain 2	CATH (4.3.0)
C	1.10.260.40	Mainly Alpha	Orthogonal Bundle	434 Repressor (Amino-terminal Domain)	lambda repressor-like DNA-binding domains	CATH (4.3.0)
C	3.30.1160.10	Alpha Beta	2-Layer Sandwich	Cyanate Lyase	Chain: A, domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	PF02560	Cyanate lyase C-terminal domain (Cyanate_lyase)	Cyanate lyase C-terminal domain	Cyanate lyase (also known as cyanase) EC:4.2.1.104 is responsible for the hydrolysis of cyanate, allowing organisms that possess the enzyme to overcome the toxicity of environmental cyanate. This enzyme is composed of two domains, an N-terminal helix ...	Cyanate lyase (also known as cyanase) EC:4.2.1.104 is responsible for the hydrolysis of cyanate, allowing organisms that possess the enzyme to overcome the toxicity of environmental cyanate. This enzyme is composed of two domains, an N-terminal helix-turn-helix and this structurally unique C-terminal domain [2].	Domain
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	PF21291	Cyanate hydratase, N-terminal (CYNS_N)	Cyanate hydratase, N-terminal	Cyanate hydratase (also known as cyanate lyase) catalyses the reaction of cyanate with bicarbonate to produce ammonia and carbon dioxide, allowing the host organisms to overcome the toxicity of environmental cyanate [1-4]. It consists of an N-termin ...	Cyanate hydratase (also known as cyanate lyase) catalyses the reaction of cyanate with bicarbonate to produce ammonia and carbon dioxide, allowing the host organisms to overcome the toxicity of environmental cyanate [1-4]. It consists of an N-terminal five-helix bundle domain that shows structural similarity to DNA-binding HTH domains and a C-terminal catalytic domain, which has a unique fold [4].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	CYANATE HYDRATASE	DNA binding binding organic cyclic compound binding nucleic acid binding lyase activity cyanate hydratase activity catalytic activity carbon-nitrogen lyase activity	organonitrogen compound catabolic process organonitrogen compound metabolic process catabolic process cellular metabolic process cyanate metabolic process organic acid metabolic process organic substance metabolic process metabolic process small molecule metabolic process cellular process cyanate catabolic process organic substance catabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR036581	Cyanate lyase, C-terminal domain superfamily	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR008076	Cyanate hydratase	Family
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR003712	Cyanate lyase, C-terminal	Domain
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR048564	Cyanate hydratase, N-terminal domain	Domain
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR010982	Lambda repressor-like, DNA-binding domain superfamily	Homologous Superfamily