4Q4S

tRNA-Guanine Transglycosylase (TGT) in Complex with 6-Amino-2-[(thiophen-2-ylmethyl)amino]-1H,7H,8H-imidazo[4,5-g]quinazolin-8-one

Replaces:  3C2Z

Functional Information from GO Data

Chain	GOid	namespace	contents
A	0002099	biological_process	tRNA wobble guanine modification
A	0005737	cellular_component	cytoplasm
A	0005829	cellular_component	cytosol
A	0006400	biological_process	tRNA modification
A	0008033	biological_process	tRNA processing
A	0008479	molecular_function	tRNA-guanosine(34) queuine transglycosylase activity
A	0008616	biological_process	tRNA queuosine(34) biosynthetic process
A	0016740	molecular_function	transferase activity
A	0016757	molecular_function	glycosyltransferase activity
A	0046872	molecular_function	metal ion binding

Functional Information from PDB Data

site_id	AC1
Number of Residues	4
Details	BINDING SITE FOR RESIDUE ZN A 401

Chain	Residue
A	CYS318
A	CYS320
A	CYS323
A	HIS349

---

site_id	AC2
Number of Residues	7
Details	BINDING SITE FOR RESIDUE GOL A 402

Chain	Residue
A	ARG97
A	HOH719
A	PRO56
A	GLU57
A	GLY94
A	TRP95
A	ASP96

---

site_id	AC3
Number of Residues	4
Details	BINDING SITE FOR RESIDUE GOL A 403

Chain	Residue
A	ALA61
A	CYS320
A	ALA321
A	GLU348

---

site_id	AC4
Number of Residues	8
Details	BINDING SITE FOR RESIDUE GOL A 404

Chain	Residue
A	TRP296
A	GLU317
A	LYS360
A	PHE373
A	ARG380
A	HOH544
A	HOH747
A	HOH752

---

site_id	AC5
Number of Residues	5
Details	BINDING SITE FOR RESIDUE GOL A 405

Chain	Residue
A	LEU311
A	CYS323
A	TRP326
A	SER327
A	HOH651

---

site_id	AC6
Number of Residues	14
Details	BINDING SITE FOR RESIDUE S98 A 406

Chain	Residue
A	ASP102
A	SER103
A	TYR106
A	ASP156
A	CYS158
A	ILE201
A	GLN203
A	GLY229
A	GLY230
A	LEU231
A	ALA232
A	MET260
A	GLY261
A	HOH579

---

Functional Information from SwissProt/UniProt

site_id	SWS_FT_FI1
Number of Residues	6
Details	Region: {"description":"RNA binding","evidences":[{"source":"HAMAP-Rule","id":"MF_00168","evidenceCode":"ECO:0000255"},{"source":"PubMed","id":"12949492","evidenceCode":"ECO:0000269"}]}

Chain

Residue

Details

---

site_id	SWS_FT_FI2
Number of Residues	4
Details	Region: {"description":"RNA binding; important for wobble base 34 recognition","evidences":[{"source":"HAMAP-Rule","id":"MF_00168","evidenceCode":"ECO:0000255"},{"source":"PubMed","id":"12949492","evidenceCode":"ECO:0000269"}]}

Chain

Residue

Details

---

site_id	SWS_FT_FI3
Number of Residues	1
Details	Active site: {"description":"Proton acceptor","evidences":[{"source":"HAMAP-Rule","id":"MF_00168","evidenceCode":"ECO:0000255"},{"source":"PubMed","id":"12949492","evidenceCode":"ECO:0000305"}]}

Chain

Residue

Details

---

site_id	SWS_FT_FI4
Number of Residues	1
Details	Active site: {"description":"Nucleophile","evidences":[{"source":"HAMAP-Rule","id":"MF_00168","evidenceCode":"ECO:0000255"},{"source":"PubMed","id":"12949492","evidenceCode":"ECO:0000305"}]}

Chain

Residue

Details

---

site_id	SWS_FT_FI5
Number of Residues	7
Details	Binding site: {"evidences":[{"source":"HAMAP-Rule","id":"MF_00168","evidenceCode":"ECO:0000255"},{"source":"PubMed","id":"12949492","evidenceCode":"ECO:0000269"}]}

Chain

Residue

Details

---

site_id	SWS_FT_FI6
Number of Residues	4
Details	Binding site: {"evidences":[{"source":"HAMAP-Rule","id":"MF_00168","evidenceCode":"ECO:0000255"},{"source":"PubMed","id":"10413112","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"11178905","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"11921407","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"12646024","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"12909636","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"12949492","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"14523925","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"19627989","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"8654383","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"8961936","evidenceCode":"ECO:0000269"}]}

Chain

Residue

Details

---

Catalytic Information from CSA

site_id	MCSA1
Number of Residues	6
Details	M-CSA 881

Chain	Residue	Details
A	ASP102	proton shuttle (general acid/base)
A	ASP280	covalent catalysis
A	CYS318	metal ligand
A	CYS320	metal ligand
A	CYS323	metal ligand
A	HIS349	metal ligand

---