1XOS

Catalytic Domain Of Human Phosphodiesterase 4B In Complex With Sildenafil

Functional Information from GO Data

Chain	GOid	namespace	contents
A	0004114	molecular_function	3',5'-cyclic-nucleotide phosphodiesterase activity
A	0007165	biological_process	signal transduction
A	0008081	molecular_function	phosphoric diester hydrolase activity

Functional Information from PDB Data

site_id	AC1
Number of Residues	6
Details	BINDING SITE FOR RESIDUE ZN A 1001

Chain	Residue
A	HIS238
A	HIS274
A	ASP275
A	ASP392
A	HOH1007
A	HOH1008

---

site_id	AC2
Number of Residues	6
Details	BINDING SITE FOR RESIDUE MG A 1002

Chain	Residue
A	HOH1005
A	HOH1006
A	HOH1007
A	ASP275
A	HOH1003
A	HOH1004

---

site_id	AC3
Number of Residues	3
Details	BINDING SITE FOR RESIDUE SO4 A 2

Chain	Residue
A	SER282
A	ASN283
A	GLN284

---

site_id	AC4
Number of Residues	16
Details	BINDING SITE FOR RESIDUE VIA A 1

Chain	Residue
A	HOH10
A	TYR233
A	HIS234
A	MET347
A	ASP392
A	ASN395
A	ILE410
A	MET411
A	SER429
A	MET431
A	CME432
A	GLN443
A	PHE446
A	ILE450
A	HOH1008
A	HOH1009

---

Functional Information from PROSITE/UniProt

site_id	PS00126
Number of Residues	12
Details	PDEASE_I_1 3'5'-cyclic nucleotide phosphodiesterase domain signature. HDVdHpGvsNqF

Chain	Residue	Details
A	HIS274-PHE285

---

Functional Information from SwissProt/UniProt

site_id	SWS_FT_FI1
Number of Residues	1
Details	ACT_SITE: Proton donor => ECO:0000305|PubMed:15003452, ECO:0007744|PDB:1ROR

Chain	Residue	Details
A	HIS234

---

site_id	SWS_FT_FI2
Number of Residues	2
Details	BINDING: BINDING => ECO:0000269|PubMed:15003452, ECO:0000269|PubMed:15260978, ECO:0007744|PDB:1ROR, ECO:0007744|PDB:1TB5

Chain	Residue	Details
A	HIS234
A	GLN443

---

site_id	SWS_FT_FI3
Number of Residues	1
Details	BINDING: BINDING => ECO:0000269|PubMed:15003452, ECO:0000269|PubMed:15260978, ECO:0000269|PubMed:15576036, ECO:0000269|PubMed:15685167, ECO:0000269|PubMed:17727341, ECO:0000269|PubMed:18539455, ECO:0007744|PDB:1RO6, ECO:0007744|PDB:1RO9, ECO:0007744|PDB:1ROR, ECO:0007744|PDB:1TB5, ECO:0007744|PDB:1XLX, ECO:0007744|PDB:1XLZ, ECO:0007744|PDB:1XM4, ECO:0007744|PDB:1XM6, ECO:0007744|PDB:1XMU, ECO:0007744|PDB:1XMY, ECO:0007744|PDB:1XN0, ECO:0007744|PDB:1XOS, ECO:0007744|PDB:1XOT, ECO:0007744|PDB:1Y2H, ECO:0007744|PDB:1Y2J, ECO:0007744|PDB:2QYL, ECO:0007744|PDB:3D3P

Chain	Residue	Details
A	HIS238

---

site_id	SWS_FT_FI4
Number of Residues	1
Details	BINDING: BINDING => ECO:0000269|PubMed:10846163, ECO:0000269|PubMed:15003452, ECO:0000269|PubMed:15576036, ECO:0000269|PubMed:15685167, ECO:0000269|PubMed:17727341, ECO:0000269|PubMed:18539455, ECO:0007744|PDB:1F0J, ECO:0007744|PDB:1RO6, ECO:0007744|PDB:1RO9, ECO:0007744|PDB:1ROR, ECO:0007744|PDB:1XLX, ECO:0007744|PDB:1XLZ, ECO:0007744|PDB:1XM4, ECO:0007744|PDB:1XM6, ECO:0007744|PDB:1XMU, ECO:0007744|PDB:1XMY, ECO:0007744|PDB:1XN0, ECO:0007744|PDB:1XOS, ECO:0007744|PDB:1XOT, ECO:0007744|PDB:1Y2H, ECO:0007744|PDB:1Y2J, ECO:0007744|PDB:2QYL, ECO:0007744|PDB:3D3P

Chain	Residue	Details
A	HIS274

---

site_id	SWS_FT_FI5
Number of Residues	1
Details	BINDING: BINDING => ECO:0000269|PubMed:15003452, ECO:0007744|PDB:1ROR

Chain	Residue	Details
A	ASP275

---

site_id	SWS_FT_FI6
Number of Residues	1
Details	BINDING: BINDING => ECO:0000269|PubMed:10846163, ECO:0000269|PubMed:15003452, ECO:0000269|PubMed:15260978, ECO:0000269|PubMed:15576036, ECO:0000269|PubMed:15685167, ECO:0000269|PubMed:18539455, ECO:0007744|PDB:1F0J, ECO:0007744|PDB:1RO6, ECO:0007744|PDB:1RO9, ECO:0007744|PDB:1ROR, ECO:0007744|PDB:1TB5, ECO:0007744|PDB:1XLX, ECO:0007744|PDB:1XLZ, ECO:0007744|PDB:1XM4, ECO:0007744|PDB:1XM6, ECO:0007744|PDB:1XMU, ECO:0007744|PDB:1XMY, ECO:0007744|PDB:1XN0, ECO:0007744|PDB:1XOS, ECO:0007744|PDB:1XOT, ECO:0007744|PDB:1Y2H, ECO:0007744|PDB:1Y2J, ECO:0007744|PDB:3D3P

Chain	Residue	Details
A	ASP392

---

site_id	SWS_FT_FI7
Number of Residues	1
Details	BINDING: BINDING => ECO:0000305|PubMed:15003452, ECO:0000305|PubMed:15260978, ECO:0007744|PDB:1ROR, ECO:0007744|PDB:1TB5

Chain	Residue	Details
A	PHE446

---

site_id	SWS_FT_FI8
Number of Residues	2
Details	MOD_RES: Phosphoserine => ECO:0000250|UniProtKB:P14646

Chain	Residue	Details
A	SER487
A	SER489

---