1BP4

USE OF PAPAIN AS A MODEL FOR THE STRUCTURE-BASED DESIGN OF CATHEPSIN K INHIBITORS. CRYSTAL STRUCTURES OF TWO PAPAIN INHIBITOR COMPLEXES DEMONSTRATE BINDING TO S'-SUBSITES.

Functional Information from GO Data

Chain	GOid	namespace	contents
A	0006508	biological_process	proteolysis
A	0008234	molecular_function	cysteine-type peptidase activity

Functional Information from PDB Data

site_id	AC1
Number of Residues	13
Details	BINDING SITE FOR RESIDUE ALD A 213

Chain	Residue
A	ASN64
A	GLY65
A	GLN142
A	ASP158
A	HIS159
A	TRP177
A	HOH412
A	GLN19
A	GLY20
A	SER21
A	GLY23
A	SER24
A	CYS25

---

site_id	CAT
Number of Residues	3
Details	CATALYTIC TRIAD

Chain	Residue
A	CYS25
A	HIS159
A	ASN175

---

Functional Information from PROSITE/UniProt

site_id	PS00139
Number of Residues	12
Details	THIOL_PROTEASE_CYS Eukaryotic thiol (cysteine) proteases cysteine active site. QGsCGSCWAfSA

Chain	Residue	Details
A	GLN19-ALA30

---

site_id	PS00639
Number of Residues	11
Details	THIOL_PROTEASE_HIS Eukaryotic thiol (cysteine) proteases histidine active site. VDHAVAAVGYG

Chain	Residue	Details
A	VAL157-GLY167

---

site_id	PS00640
Number of Residues	20
Details	THIOL_PROTEASE_ASN Eukaryotic thiol (cysteine) proteases asparagine active site. YILiKNSWgtgWGenGYIrI

Chain	Residue	Details
A	TYR170-ILE189

---

Functional Information from SwissProt/UniProt

site_id	SWS_FT_FI1
Number of Residues	1
Details	Active site: {"evidences":[{"source":"PROSITE-ProRule","id":"PRU10088","evidenceCode":"ECO:0000255"},{"source":"PubMed","id":"5681232","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"6502713","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"952885","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"1860874","evidenceCode":"ECO:0000305"},{"source":"PDB","id":"1PAD","evidenceCode":"ECO:0007744"},{"source":"PDB","id":"9PAP","evidenceCode":"ECO:0007744"}]}

Chain

Residue

Details

---

site_id	SWS_FT_FI2
Number of Residues	1
Details	Active site: {"evidences":[{"source":"PROSITE-ProRule","id":"PRU10089","evidenceCode":"ECO:0000255"},{"source":"PubMed","id":"6502713","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"952885","evidenceCode":"ECO:0000269"},{"source":"PDB","id":"1PAD","evidenceCode":"ECO:0007744"},{"source":"PDB","id":"9PAP","evidenceCode":"ECO:0007744"}]}

Chain

Residue

Details

---

site_id	SWS_FT_FI3
Number of Residues	1
Details	Active site: {"evidences":[{"source":"PROSITE-ProRule","id":"PRU10090","evidenceCode":"ECO:0000255"},{"source":"PubMed","id":"5681232","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"6502713","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"952885","evidenceCode":"ECO:0000269"},{"source":"PDB","id":"1PAD","evidenceCode":"ECO:0007744"},{"source":"PDB","id":"9PAP","evidenceCode":"ECO:0007744"}]}

Chain

Residue

Details

---

site_id	SWS_FT_FI4
Number of Residues	1
Details	Binding site: {"description":"covalent","evidences":[{"source":"PubMed","id":"8416808","evidenceCode":"ECO:0000269"},{"source":"PDB","id":"1POP","evidenceCode":"ECO:0007744"}]}

Chain

Residue

Details

---

Catalytic Information from CSA

site_id	CSA1
Number of Residues	3
Details	Annotated By Reference To The Literature 1pad

Chain	Residue	Details
A	ASN175
A	CYS25
A	HIS159

---

site_id	CSA2
Number of Residues	3
Details	Annotated By Reference To The Literature 1pad

Chain	Residue	Details
A	GLN19
A	CYS25
A	HIS159

---

site_id	CSA3
Number of Residues	3
Details	Annotated By Reference To The Literature 1pad

Chain	Residue	Details
A	ASN175
A	GLN19
A	HIS159

---

site_id	MCSA1
Number of Residues	4
Details	M-CSA 174

Chain	Residue	Details
A	GLN19	electrostatic stabiliser, hydrogen bond donor
A	CYS25	electrostatic stabiliser
A	HIS159	electrostatic stabiliser, hydrogen bond acceptor, hydrogen bond donor, proton acceptor, proton donor
A	ASN175	activator, electrostatic stabiliser, hydrogen bond acceptor

---