1A95

XPRTASE FROM E. COLI COMPLEXED WITH MG:CPRPP AND GUANINE

Functional Information from GO Data

Chain	GOid	namespace	contents
A	0000287	molecular_function	magnesium ion binding
A	0000310	molecular_function	xanthine phosphoribosyltransferase activity
A	0004422	molecular_function	hypoxanthine phosphoribosyltransferase activity
A	0005829	cellular_component	cytosol
A	0005886	cellular_component	plasma membrane
A	0006166	biological_process	purine ribonucleoside salvage
A	0016020	cellular_component	membrane
A	0016740	molecular_function	transferase activity
A	0016757	molecular_function	glycosyltransferase activity
A	0032263	biological_process	GMP salvage
A	0032264	biological_process	IMP salvage
A	0032265	biological_process	XMP salvage
A	0032991	cellular_component	protein-containing complex
A	0042802	molecular_function	identical protein binding
A	0046872	molecular_function	metal ion binding
A	0051289	biological_process	protein homotetramerization
A	0052657	molecular_function	guanine phosphoribosyltransferase activity
A	0097216	molecular_function	guanosine tetraphosphate binding
B	0000287	molecular_function	magnesium ion binding
B	0000310	molecular_function	xanthine phosphoribosyltransferase activity
B	0004422	molecular_function	hypoxanthine phosphoribosyltransferase activity
B	0005829	cellular_component	cytosol
B	0005886	cellular_component	plasma membrane
B	0006166	biological_process	purine ribonucleoside salvage
B	0016020	cellular_component	membrane
B	0016740	molecular_function	transferase activity
B	0016757	molecular_function	glycosyltransferase activity
B	0032263	biological_process	GMP salvage
B	0032264	biological_process	IMP salvage
B	0032265	biological_process	XMP salvage
B	0032991	cellular_component	protein-containing complex
B	0042802	molecular_function	identical protein binding
B	0046872	molecular_function	metal ion binding
B	0051289	biological_process	protein homotetramerization
B	0052657	molecular_function	guanine phosphoribosyltransferase activity
B	0097216	molecular_function	guanosine tetraphosphate binding
C	0000287	molecular_function	magnesium ion binding
C	0000310	molecular_function	xanthine phosphoribosyltransferase activity
C	0004422	molecular_function	hypoxanthine phosphoribosyltransferase activity
C	0005829	cellular_component	cytosol
C	0005886	cellular_component	plasma membrane
C	0006166	biological_process	purine ribonucleoside salvage
C	0016020	cellular_component	membrane
C	0016740	molecular_function	transferase activity
C	0016757	molecular_function	glycosyltransferase activity
C	0032263	biological_process	GMP salvage
C	0032264	biological_process	IMP salvage
C	0032265	biological_process	XMP salvage
C	0032991	cellular_component	protein-containing complex
C	0042802	molecular_function	identical protein binding
C	0046872	molecular_function	metal ion binding
C	0051289	biological_process	protein homotetramerization
C	0052657	molecular_function	guanine phosphoribosyltransferase activity
C	0097216	molecular_function	guanosine tetraphosphate binding
D	0000287	molecular_function	magnesium ion binding
D	0000310	molecular_function	xanthine phosphoribosyltransferase activity
D	0004422	molecular_function	hypoxanthine phosphoribosyltransferase activity
D	0005829	cellular_component	cytosol
D	0005886	cellular_component	plasma membrane
D	0006166	biological_process	purine ribonucleoside salvage
D	0016020	cellular_component	membrane
D	0016740	molecular_function	transferase activity
D	0016757	molecular_function	glycosyltransferase activity
D	0032263	biological_process	GMP salvage
D	0032264	biological_process	IMP salvage
D	0032265	biological_process	XMP salvage
D	0032991	cellular_component	protein-containing complex
D	0042802	molecular_function	identical protein binding
D	0046872	molecular_function	metal ion binding
D	0051289	biological_process	protein homotetramerization
D	0052657	molecular_function	guanine phosphoribosyltransferase activity
D	0097216	molecular_function	guanosine tetraphosphate binding

Functional Information from PDB Data

site_id	AC1
Number of Residues	3
Details	BINDING SITE FOR RESIDUE MG C 307

Chain	Residue
C	PCP302
C	HOH533
C	HOH534

---

site_id	AC2
Number of Residues	3
Details	BINDING SITE FOR RESIDUE MG B 308

Chain	Residue
B	PCP301
B	HOH535
B	HOH536

---

site_id	AC3
Number of Residues	17
Details	BINDING SITE FOR RESIDUE PCP B 301

Chain	Residue
B	ARG69
B	ASP88
B	ASP89
B	LEU90
B	ASP92
B	THR93
B	GLY94
B	GLY95
B	THR96
B	GUN304
B	MG308
B	HOH466
B	HOH535
B	HOH536
B	SER36
B	ARG37
B	GLY38

---

site_id	AC4
Number of Residues	18
Details	BINDING SITE FOR RESIDUE PCP C 302

Chain	Residue
C	ARG37
C	GLY38
C	ARG69
C	ASP88
C	ASP89
C	LEU90
C	ASP92
C	THR93
C	GLY94
C	GLY95
C	THR96
C	GUN303
C	MG307
C	HOH421
C	HOH453
C	HOH463
C	HOH487
C	HOH533

---

site_id	AC5
Number of Residues	7
Details	BINDING SITE FOR RESIDUE GUN C 303

Chain	Residue
C	ASP92
C	LYS115
C	TRP134
C	ILE135
C	PCP302
C	HOH424
C	HOH487

---

site_id	AC6
Number of Residues	7
Details	BINDING SITE FOR RESIDUE GUN B 304

Chain	Residue
B	LEU90
B	ASP92
B	LYS115
B	TRP134
B	ILE135
B	PCP301
B	HOH435

---

site_id	AC7
Number of Residues	7
Details	BINDING SITE FOR RESIDUE BO3 D 305

Chain	Residue
B	ASN67
D	VAL35
D	SER36
D	ARG37
D	GLY38
D	ASP88
D	HOH422

---

site_id	AC8
Number of Residues	7
Details	BINDING SITE FOR RESIDUE BO3 A 306

Chain	Residue
A	VAL35
A	SER36
A	ARG37
A	GLY38
A	ASP88
A	HOH471
C	ASN67

---

Functional Information from PROSITE/UniProt

site_id	PS00103
Number of Residues	13
Details	PUR_PYR_PR_TRANSFER Purine/pyrimidine phosphoribosyl transferases signature. FIVIDDLVDTGgT

Chain	Residue	Details
A	PHE84-THR96

---

Functional Information from SwissProt/UniProt

site_id	SWS_FT_FI1
Number of Residues	8
Details	BINDING: BINDING => ECO:0000305|PubMed:9743633, ECO:0007744|PDB:1A95

Chain	Residue	Details
A	ARG37
A	ASP88
B	ARG37
B	ASP88
C	ARG37
C	ASP88
D	ARG37
D	ASP88

---

site_id	SWS_FT_FI2
Number of Residues	8
Details	BINDING: BINDING => ECO:0000269|PubMed:9743633, ECO:0007744|PDB:1A97

Chain	Residue	Details
A	ARG69
A	TRP134
B	ARG69
B	TRP134
C	ARG69
C	TRP134
D	ARG69
D	TRP134

---

site_id	SWS_FT_FI3
Number of Residues	4
Details	BINDING: BINDING => ECO:0000269|PubMed:9100006

Chain	Residue	Details
A	ASP89
B	ASP89
C	ASP89
D	ASP89

---

site_id	SWS_FT_FI4
Number of Residues	8
Details	BINDING: BINDING => ECO:0000269|PubMed:9743633, ECO:0007744|PDB:1A96

Chain	Residue	Details
A	ASP92
A	ILE135
B	ASP92
B	ILE135
C	ASP92
C	ILE135
D	ASP92
D	ILE135

---

Catalytic Information from CSA

site_id	MCSA1
Number of Residues	3
Details	M-CSA 391

Chain	Residue	Details
A	ASP88	electrostatic stabiliser
A	ASP89	electrostatic stabiliser
A	ASP92	proton shuttle (general acid/base)

---

site_id	MCSA2
Number of Residues	3
Details	M-CSA 391

Chain	Residue	Details
B	ASP88	electrostatic stabiliser
B	ASP89	electrostatic stabiliser
B	ASP92	proton shuttle (general acid/base)

---

site_id	MCSA3
Number of Residues	3
Details	M-CSA 391

Chain	Residue	Details
C	ASP88	electrostatic stabiliser
C	ASP89	electrostatic stabiliser
C	ASP92	proton shuttle (general acid/base)

---

site_id	MCSA4
Number of Residues	3
Details	M-CSA 391

Chain	Residue	Details
D	ASP88	electrostatic stabiliser
D	ASP89	electrostatic stabiliser
D	ASP92	proton shuttle (general acid/base)

---