1P2N - JenaLib

Asymmetric Unit (Jmol Viewer)

Asym. Unit - sites (Jmol Viewer)

Biological Unit 1 (Jmol Viewer)

Biol. Unit 1 - sites (Jmol Viewer)

Biological Unit 2 (Jmol Viewer)

Biological Unit 3 (Jmol Viewer)

Biological Unit 4 (Jmol Viewer)

Biological Unit 5 (Jmol Viewer)

Biological Unit 6 (Jmol Viewer)

Title :   STRUCTURAL CONSEQUENCES OF ACCOMMODATION OF FOUR NON-COGNATE AMINO-ACID RESIDUES IN THE S1 POCKET OF BOVINE TRYPSIN AND CHYMOTRYPSIN

Authors :   R. Helland, H. Czapinska, I. Leiros, M. Olufsen, J. Otlewski, A. O. Smalaas

Date :   15 Apr 03 (Deposition) - 20 Apr 04 (Release) - 24 Feb 09 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   1.80

Chains :   Asym. Unit : A,B,C,D
Biol. Unit 1: A,B  (1x)
Biol. Unit 2: C,D  (1x)
Biol. Unit 3: A (1x),B (1x),C (1x),D (1x)
Biol. Unit 4: A,B,C,D  (1x)
Biol. Unit 5: B (1x),C (1x)
Biol. Unit 6: A (1x),D (1x)

Keywords :   Trypsin; Chymotrypsin; Serine Proteinase; Bovine Pancreatic Trypsin Inhibitor; Protein-Protein Interaction; Non-Cognate Binding; S1 Pocket; Primary Specificity; Crystal Structure, Hydrolase/Hydrolase Inhibitor Complex (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   R. Helland, H. Czapinska, I. Leiros, M. Olufsen, J. Otlewski, A. O. Smalaas
Structural Consequences Of Accommodation Of Four Non-Cognate Amino Acid Residues In The S1 Pocket Of Bovine Trypsin And Chymotrypsin.
J. Mol. Biol. V. 333 845 2003
PubMed-ID: 14568540 | Reference-DOI: 10.1016/J.JMB.2003.08.059
(for further references see the PDB file header)

Molecule 1 - CHYMOTRYPSINOGEN A
	Chains	:	A, C
	EC Number	:	3.4.21.1
	Organism Common	:	CATTLE
	Organism Scientific	:	BOS TAURUS
	Organism Taxid	:	9913

Molecule 2 - PANCREATIC TRYPSIN INHIBITOR
	Chains	:	B, D
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI BL21(DE3)
	Expression System Strain	:	BL21 (DE3)
	Expression System Taxid	:	469008
	Expression System Vector	:	PAED4
	Expression System Vector Type	:	PLASMID
	Mutation	:	YES
	Organism Common	:	CATTLE
	Organism Scientific	:	BOS TAURUS
	Organism Taxid	:	9913
	Other Details	:	T7 PROMOTER
	Synonym	:	BASIC PROTEASE INHIBITOR, BPI, BPTI, APROTININ

		1	2	3	4
Asymmetric Unit	:	A	B	C	D
Biological Unit 1 (1x)	:	A	B
Biological Unit 2 (1x)	:			C	D
Biological Unit 3 (1x)	:	A (1x)	B (1x)	C (1x)	D (1x)
Biological Unit 4 (1x)	:	A	B	C	D
Biological Unit 5 (1x)	:		B (1x)	C (1x)
Biological Unit 6 (1x)	:	A (1x)			D (1x)

Summary Information (see also Sequences/Alignments below)

Asymmetric Unit (1, 6)

No.	Name	Count	Type	Full Name
1	SO4	6	Ligand/Ion	SULFATE ION

Biological Unit 1 (1, 5)

No.	Name	Count	Type	Full Name
1	SO4	5	Ligand/Ion	SULFATE ION

Biological Unit 2 (1, 1)

No.	Name	Count	Type	Full Name
1	SO4	1	Ligand/Ion	SULFATE ION

Biological Unit 3 (1, 5)

No.	Name	Count	Type	Full Name
1	SO4	5	Ligand/Ion	SULFATE ION

Biological Unit 4 (1, 6)

No.	Name	Count	Type	Full Name
1	SO4	6	Ligand/Ion	SULFATE ION

Biological Unit 5 (1, 4)

No.	Name	Count	Type	Full Name
1	SO4	4	Ligand/Ion	SULFATE ION

Biological Unit 6 (1, 1)

No.	Name	Count	Type	Full Name
1	SO4	1	Ligand/Ion	SULFATE ION

Asymmetric Unit (6, 6)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	PHE B:4 , GLU B:7 , ARG B:42 , HOH B:2009 , HOH B:2315 , TYR D:10 , HOH D:2420	BINDING SITE FOR RESIDUE SO4 B 601
2	AC2	SOFTWARE	HOH A:660 , ARG B:20 , TYR B:35 , GLY B:37 , ALA B:40 , HOH B:671 , HOH B:682 , LEU C:97	BINDING SITE FOR RESIDUE SO4 B 602
3	AC3	SOFTWARE	TYR B:10 , HOH B:2251 , HOH B:2302 , HOH B:2481 , PHE D:4 , GLU D:7 , ARG D:42 , HOH D:2017	BINDING SITE FOR RESIDUE SO4 B 603
4	AC4	SOFTWARE	PRO B:2 , ASP B:3 , HOH B:2012 , HOH B:2065 , HOH B:2250 , HOH B:2338 , TYR C:171 , TRP C:172 , SER C:217 , SER C:218 , HOH C:2069	BINDING SITE FOR RESIDUE SO4 B 604
5	AC5	SOFTWARE	TYR A:171 , TRP A:172 , SER A:217 , SER A:218 , HOH A:2110 , HOH A:2247 , HOH A:2334 , PRO D:2 , ASP D:3 , HOH D:2013 , HOH D:2090	BINDING SITE FOR RESIDUE SO4 A 605
6	AC6	SOFTWARE	LEU A:97 , HOH C:1660 , ARG D:20 , TYR D:35 , GLY D:37 , HOH D:1671	BINDING SITE FOR RESIDUE SO4 D 1602

Asymmetric Unit

No.	Residues
1	A:1	-	A:122
2	A:42	-	A:58
3	A:136	-	A:201
4	A:168	-	A:182
5	A:191	-	A:220
6	B:5	-	B:55
7	B:14	-	B:38
8	B:30	-	B:51
9	C:1	-	C:122
10	C:42	-	C:58
11	C:136	-	C:201
12	C:168	-	C:182
13	C:191	-	C:220
14	D:5	-	D:55
15	D:14	-	D:38
16	D:30	-	D:51

(no "Cis Peptide Bond" information available for 1P2N)

(no "SAP(SNP)/Variant" information available for 1P2N)

Asymmetric Unit (5, 10)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	TRYPSIN_DOM	PS50240	Serine proteases, trypsin domain profile.	CTRA_BOVIN	16-243	2	A:16-243 C:16-243
2	BPTI_KUNITZ_2	PS50279	Pancreatic trypsin inhibitor (Kunitz) family profile.	BPT1_BOVIN	40-90	2	B:5-55 D:5-55
3	TRYPSIN_HIS	PS00134	Serine proteases, trypsin family, histidine active site.	CTRA_BOVIN	53-58	2	A:53-58 C:53-58
4	BPTI_KUNITZ_1	PS00280	Pancreatic trypsin inhibitor (Kunitz) family signature.	BPT1_BOVIN	68-86	2	B:33-51 D:33-51
5	TRYPSIN_SER	PS00135	Serine proteases, trypsin family, serine active site.	CTRA_BOVIN	189-200	2	A:189-200 C:189-200

Biological Unit 1 (5, 5)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	TRYPSIN_DOM	PS50240	Serine proteases, trypsin domain profile.	CTRA_BOVIN	16-243	1	A:16-243 -
2	BPTI_KUNITZ_2	PS50279	Pancreatic trypsin inhibitor (Kunitz) family profile.	BPT1_BOVIN	40-90	1	B:5-55 -
3	TRYPSIN_HIS	PS00134	Serine proteases, trypsin family, histidine active site.	CTRA_BOVIN	53-58	1	A:53-58 -
4	BPTI_KUNITZ_1	PS00280	Pancreatic trypsin inhibitor (Kunitz) family signature.	BPT1_BOVIN	68-86	1	B:33-51 -
5	TRYPSIN_SER	PS00135	Serine proteases, trypsin family, serine active site.	CTRA_BOVIN	189-200	1	A:189-200 -

Biological Unit 2 (5, 5)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	TRYPSIN_DOM	PS50240	Serine proteases, trypsin domain profile.	CTRA_BOVIN	16-243	1	- C:16-243
2	BPTI_KUNITZ_2	PS50279	Pancreatic trypsin inhibitor (Kunitz) family profile.	BPT1_BOVIN	40-90	1	- D:5-55
3	TRYPSIN_HIS	PS00134	Serine proteases, trypsin family, histidine active site.	CTRA_BOVIN	53-58	1	- C:53-58
4	BPTI_KUNITZ_1	PS00280	Pancreatic trypsin inhibitor (Kunitz) family signature.	BPT1_BOVIN	68-86	1	- D:33-51
5	TRYPSIN_SER	PS00135	Serine proteases, trypsin family, serine active site.	CTRA_BOVIN	189-200	1	- C:189-200

Biological Unit 3 (5, 10)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	TRYPSIN_DOM	PS50240	Serine proteases, trypsin domain profile.	CTRA_BOVIN	16-243	2	A:16-243 C:16-243
2	BPTI_KUNITZ_2	PS50279	Pancreatic trypsin inhibitor (Kunitz) family profile.	BPT1_BOVIN	40-90	2	B:5-55 D:5-55
3	TRYPSIN_HIS	PS00134	Serine proteases, trypsin family, histidine active site.	CTRA_BOVIN	53-58	2	A:53-58 C:53-58
4	BPTI_KUNITZ_1	PS00280	Pancreatic trypsin inhibitor (Kunitz) family signature.	BPT1_BOVIN	68-86	2	B:33-51 D:33-51
5	TRYPSIN_SER	PS00135	Serine proteases, trypsin family, serine active site.	CTRA_BOVIN	189-200	2	A:189-200 C:189-200

Biological Unit 4 (5, 10)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	TRYPSIN_DOM	PS50240	Serine proteases, trypsin domain profile.	CTRA_BOVIN	16-243	2	A:16-243 C:16-243
2	BPTI_KUNITZ_2	PS50279	Pancreatic trypsin inhibitor (Kunitz) family profile.	BPT1_BOVIN	40-90	2	B:5-55 D:5-55
3	TRYPSIN_HIS	PS00134	Serine proteases, trypsin family, histidine active site.	CTRA_BOVIN	53-58	2	A:53-58 C:53-58
4	BPTI_KUNITZ_1	PS00280	Pancreatic trypsin inhibitor (Kunitz) family signature.	BPT1_BOVIN	68-86	2	B:33-51 D:33-51
5	TRYPSIN_SER	PS00135	Serine proteases, trypsin family, serine active site.	CTRA_BOVIN	189-200	2	A:189-200 C:189-200

Biological Unit 5 (5, 5)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	TRYPSIN_DOM	PS50240	Serine proteases, trypsin domain profile.	CTRA_BOVIN	16-243	1	- C:16-243
2	BPTI_KUNITZ_2	PS50279	Pancreatic trypsin inhibitor (Kunitz) family profile.	BPT1_BOVIN	40-90	1	B:5-55 -
3	TRYPSIN_HIS	PS00134	Serine proteases, trypsin family, histidine active site.	CTRA_BOVIN	53-58	1	- C:53-58
4	BPTI_KUNITZ_1	PS00280	Pancreatic trypsin inhibitor (Kunitz) family signature.	BPT1_BOVIN	68-86	1	B:33-51 -
5	TRYPSIN_SER	PS00135	Serine proteases, trypsin family, serine active site.	CTRA_BOVIN	189-200	1	- C:189-200

Biological Unit 6 (5, 5)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	TRYPSIN_DOM	PS50240	Serine proteases, trypsin domain profile.	CTRA_BOVIN	16-243	1	A:16-243 -
2	BPTI_KUNITZ_2	PS50279	Pancreatic trypsin inhibitor (Kunitz) family profile.	BPT1_BOVIN	40-90	1	- D:5-55
3	TRYPSIN_HIS	PS00134	Serine proteases, trypsin family, histidine active site.	CTRA_BOVIN	53-58	1	A:53-58 -
4	BPTI_KUNITZ_1	PS00280	Pancreatic trypsin inhibitor (Kunitz) family signature.	BPT1_BOVIN	68-86	1	- D:33-51
5	TRYPSIN_SER	PS00135	Serine proteases, trypsin family, serine active site.	CTRA_BOVIN	189-200	1	A:189-200 -

(no "Exon" information available for 1P2N)

Asymmetric Unit

Reformat:	Number of residues per line = ('0' or empty: single-line sequence representation)
	Number of residues per labelling interval =
	UniProt sequence: complete aligned part

Show mapping:	SCOP domains	CATH domains	Pfam domains	Secondary structure (by author)
	SAPs(SNPs)	PROSITE motifs	Exons
	(details for a mapped element are shown in a popup box when the mouse pointer rests over it)

Chain A from PDB  Type:PROTEIN  Length:239
 aligned with CTRA_BOVIN | P00766 from UniProtKB/Swiss-Prot  Length:245

    Alignment length:245
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240     
           CTRA_BOVIN     1 CGVPAIQPVLSGLSRIVNGEEAVPGSWPWQVSLQDKTGFHFCGGSLINENWVVTAAHCGVTTSDVVVAGEFDQGSSSEKIQKLKIAKVFKNSKYNSLTINNDITLLKLSTAASFSQTVSAVCLPSASDDFAAGTTCVTTGWGLTRYTNANTPDRLQQASLPLLSNTNCKKYWGTKIKDAMICAGASGVSSCMGDSGGPLVCKKNGAWTLVGIVSWGSSTCSTSTPGVYARVTALVNWVQQTLAAN 245
               SCOP domains d1p2na_ A:     (alpha,gamma)-chymotrypsin(ogen)                                                                                                                                                                                                       SCOP domains
               CATH domains -----------    1p2nA01     1p2nA02 A:28-120,A:233-243 Trypsin-like serine proteases                                     1p2nA01 A:16-27,A:121-232   Trypsin-like serine proteases                                                       1p2nA02    -- CATH domains
               Pfam domains ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...........----....ee........eeeee.....eeeeeeeee..eeeehhhhh.....eeee............eeeeeeeeee.............eeeee..........................eeeeee......--.......eeeeeeeehhhhhhhhhhhhh...eeeee.............eeeeee..eeeeeeeeee.........eeeeeehhhhhhhhhhhhhhh Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) ---------------TRYPSIN_DOM  PDB: A:16-243 UniProt: 16-243                                                                                                                                                                                          -- PROSITE (1)
                PROSITE (2) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------TRYPSIN_SER --------------------------------------------- PROSITE (2)
                PROSITE (3) ----------------------------------------------------TRYPSI------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE (3)
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1p2n A   1 CGVPAIQPVLS----IVNGEEAVPGSWPWQVSLQDKTGFHFCGGSLINENWVVTAAHCGVTTSDVVVAGEFDQGSSSEKIQKLKIAKVFKNSKYNSLTINNDITLLKLSTAASFSQTVSAVCLPSASDDFAAGTTCVTTGWGLTRY--ANTPDRLQQASLPLLSNTNCKKYWGTKIKDAMICAGASGVSSCMGDSGGPLVCKKNGAWTLVGIVSWGSSTCSTSTPGVYARVTALVNWVQQTLAAN 245
                                    10|    |  20        30        40        50        60        70        80        90       100       110       120       130       140     | 150       160       170       180       190       200       210       220       230       240     
                                     11   16                                                                                                                               146  |                                                                                                
                                                                                                                                                                              149

Chain B from PDB  Type:PROTEIN  Length:58
 aligned with BPT1_BOVIN | P00974 from UniProtKB/Swiss-Prot  Length:100

    Alignment length:58
                                    45        55        65        75        85        
           BPT1_BOVIN    36 RPDFCLEPPYTGPCKARIIRYFYNAKAGLCQTFVYGGCRAKRNNFKSAEDCMRTCGGA  93
               SCOP domains d1p2nb_ B: Pancreatic trypsin inhibitor, BPTI              SCOP domains
               CATH domains 1p2nB00 B:1-58 Factor Xa Inhibitor                         CATH domains
               Pfam domains ---------------------------------------------------------- Pfam domains
         Sec.struct. author .hhhhhh..........eeeeee......eeeeee...........hhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------- SAPs(SNPs)
                PROSITE (2) ----BPTI_KUNITZ_2  PDB: B:5-55 UniProt: 40-90          --- PROSITE (2)
                PROSITE (3) --------------------------------BPTI_KUNITZ_1      ------- PROSITE (3)
                 Transcript ---------------------------------------------------------- Transcript
                 1p2n B   1 RPDFCLEPPYTGPCLARIIRYFYNAKAGLCQTFVYGGCRAKRNNFKSAEDCLRTCGGA  58
                                    10        20        30        40        50

Chain C from PDB  Type:PROTEIN  Length:239
 aligned with CTRA_BOVIN | P00766 from UniProtKB/Swiss-Prot  Length:245

    Alignment length:245
                                    10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240     
           CTRA_BOVIN     1 CGVPAIQPVLSGLSRIVNGEEAVPGSWPWQVSLQDKTGFHFCGGSLINENWVVTAAHCGVTTSDVVVAGEFDQGSSSEKIQKLKIAKVFKNSKYNSLTINNDITLLKLSTAASFSQTVSAVCLPSASDDFAAGTTCVTTGWGLTRYTNANTPDRLQQASLPLLSNTNCKKYWGTKIKDAMICAGASGVSSCMGDSGGPLVCKKNGAWTLVGIVSWGSSTCSTSTPGVYARVTALVNWVQQTLAAN 245
               SCOP domains d1p2nc_ C:     (alpha,gamma)-chymotrypsin(ogen)                                                                                                                                                                                                       SCOP domains
               CATH domains -----------    1p2nC01     1p2nC02 C:28-120,C:233-243 Trypsin-like serine proteases                                     1p2nC01 C:16-27,C:121-232   Trypsin-like serine proteases                                                       1p2nC02    -- CATH domains
           Pfam domains (1) -----------    Trypsin-1p2nC01 C:16-238                                                                                                                                                                                                       ------- Pfam domains (1)
           Pfam domains (2) -----------    Trypsin-1p2nC02 C:16-238                                                                                                                                                                                                       ------- Pfam domains (2)
         Sec.struct. author ...........----....ee........eeeee.....eeeeeeeee..eeeehhhhh.....eeee............eeeeeeeeee.............eeeee..........................eeeeee......--.......eeeeee..hhhhhhhhhhhhh...eeeee.............eeeeee..eeeeeeeeee.........eeeeeehhhhhhhhhhhhhhh Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                PROSITE (1) ---------------TRYPSIN_DOM  PDB: C:16-243 UniProt: 16-243                                                                                                                                                                                          -- PROSITE (1)
                PROSITE (2) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------TRYPSIN_SER --------------------------------------------- PROSITE (2)
                PROSITE (3) ----------------------------------------------------TRYPSI------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE (3)
                 Transcript ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1p2n C   1 CGVPAIQPVLS----IVNGEEAVPGSWPWQVSLQDKTGFHFCGGSLINENWVVTAAHCGVTTSDVVVAGEFDQGSSSEKIQKLKIAKVFKNSKYNSLTINNDITLLKLSTAASFSQTVSAVCLPSASDDFAAGTTCVTTGWGLTRY--ANTPDRLQQASLPLLSNTNCKKYWGTKIKDAMICAGASGVSSCMGDSGGPLVCKKNGAWTLVGIVSWGSSTCSTSTPGVYARVTALVNWVQQTLAAN 245
                                    10|    |  20        30        40        50        60        70        80        90       100       110       120       130       140     | 150       160       170       180       190       200       210       220       230       240     
                                     11   16                                                                                                                               146  |                                                                                                
                                                                                                                                                                              149

Chain D from PDB  Type:PROTEIN  Length:58
 aligned with BPT1_BOVIN | P00974 from UniProtKB/Swiss-Prot  Length:100

    Alignment length:58
                                    45        55        65        75        85        
           BPT1_BOVIN    36 RPDFCLEPPYTGPCKARIIRYFYNAKAGLCQTFVYGGCRAKRNNFKSAEDCMRTCGGA  93
               SCOP domains d1p2nd_ D: Pancreatic trypsin inhibitor, BPTI              SCOP domains
               CATH domains 1p2nD00 D:1-58 Factor Xa Inhibitor                         CATH domains
           Pfam domains (1) ---Kunitz_BPTI-1p2nD01 D:4-56                           -- Pfam domains (1)
           Pfam domains (2) ---Kunitz_BPTI-1p2nD02 D:4-56                           -- Pfam domains (2)
         Sec.struct. author .hhhhhh..........eeeeeee....eeeeeee...........hhhhhhhhhh.. Sec.struct. author
                 SAPs(SNPs) ---------------------------------------------------------- SAPs(SNPs)
                PROSITE (2) ----BPTI_KUNITZ_2  PDB: D:5-55 UniProt: 40-90          --- PROSITE (2)
                PROSITE (3) --------------------------------BPTI_KUNITZ_1      ------- PROSITE (3)
                 Transcript ---------------------------------------------------------- Transcript
                 1p2n D   1 RPDFCLEPPYTGPCLARIIRYFYNAKAGLCQTFVYGGCRAKRNNFKSAEDCLRTCGGA  58
                                    10        20        30        40        50

Legend:		→ Mismatch	(orange background)
	-	→ Gap	(green background, '-', border residues have a numbering label)
		→ Modified Residue	(blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
	x	→ Chemical Group	(purple background, 'x', labelled with number + name, e.g. ACE or NH2)
	extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '\|'

Asymmetric Unit

Classes(

)

Architectures( (-)

)

Topologies( (-)

)

Homologous Superfamilies( (-)

)

Organisms( (-)

)

Class: Few Secondary Structures (1120)

Architecture: Irregular (1120)

Topology: Factor Xa Inhibitor (116)

Homologous Superfamily: Factor Xa Inhibitor (116)

Cattle (Bos taurus) (61)

1a	1p2nB00	B:1-58
1b	1p2nD00	D:1-58

Class: Mainly Beta (13760)

Architecture: Beta Barrel (4804)

Topology: Thrombin, subunit H (1535)

Homologous Superfamily: Trypsin-like serine proteases (1488)

Cattle (Bos taurus) (308)

2a	1p2nA02	A:28-120,A:233-243
2b	1p2nC02	C:28-120,C:233-243
2c	1p2nA01	A:16-27,A:121-232
2d	1p2nC01	C:16-27,C:121-232

Asymmetric Unit

Clans(

)

Families(

)

Organisms( (-)

)

Clan: Peptidase_PA (797)

Family: Trypsin (679)

Bos taurus (Bovine) (190)

1a	Trypsin-1p2nC01	C:16-238
1b	Trypsin-1p2nC02	C:16-238

Clan: Protease_inhib (47)

Family: Kunitz_BPTI (45)

Bos taurus (Bovine) (33)

2a	Kunitz_BPTI-1p2nD01	D:4-56
2b	Kunitz_BPTI-1p2nD02	D:4-56

Asymmetric Unit(hide GO term definitions)

Chain A,C (CTRA_BOVIN | P00766)

molecular function
	GO:0016787	hydrolase activity	Catalysis of the hydrolysis of various bonds, e.g. C-O, C-N, C-C, phosphoric anhydride bonds, etc. Hydrolase is the systematic name for any enzyme of EC class 3.
	GO:0008233	peptidase activity	Catalysis of the hydrolysis of a peptide bond. A peptide bond is a covalent bond formed when the carbon atom from the carboxyl group of one amino acid shares electrons with the nitrogen atom from the amino group of a second amino acid.
	GO:0005515	protein binding	Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
	GO:0004252	serine-type endopeptidase activity	Catalysis of the hydrolysis of internal, alpha-peptide bonds in a polypeptide chain by a catalytic mechanism that involves a catalytic triad consisting of a serine nucleophile that is activated by a proton relay involving an acidic residue (e.g. aspartate or glutamate) and a basic residue (usually histidine).
	GO:0008236	serine-type peptidase activity	Catalysis of the hydrolysis of peptide bonds in a polypeptide chain by a catalytic mechanism that involves a catalytic triad consisting of a serine nucleophile that is activated by a proton relay involving an acidic residue (e.g. aspartate or glutamate) and a basic residue (usually histidine).
biological process
	GO:0007586	digestion	The whole of the physical, chemical, and biochemical processes carried out by multicellular organisms to break down ingested nutrients into components that may be easily absorbed and directed into metabolism.
	GO:0006508	proteolysis	The hydrolysis of proteins into smaller polypeptides and/or amino acids by cleavage of their peptide bonds.
cellular component
	GO:0005576	extracellular region	The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite.
	GO:0005615	extracellular space	That part of a multicellular organism outside the cells proper, usually taken to be outside the plasma membranes, and occupied by fluid.

Chain B,D (BPT1_BOVIN | P00974)

molecular function
	GO:0030414	peptidase inhibitor activity	Stops, prevents or reduces the activity of a peptidase, any enzyme that catalyzes the hydrolysis peptide bonds.
	GO:0019870	potassium channel inhibitor activity	Stops, prevents, or reduces the activity of a potassium channel.
	GO:0005515	protein binding	Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
	GO:0004867	serine-type endopeptidase inhibitor activity	Stops, prevents or reduces the activity of serine-type endopeptidases, enzymes that catalyze the hydrolysis of nonterminal peptide bonds in a polypeptide chain; a serine residue (and a histidine residue) are at the active center of the enzyme.
biological process
	GO:0010951	negative regulation of endopeptidase activity	Any process that decreases the frequency, rate or extent of endopeptidase activity, the endohydrolysis of peptide bonds within proteins.
	GO:0010466	negative regulation of peptidase activity	Any process that stops or reduces the rate of peptidase activity, the hydrolysis of peptide bonds within proteins.
	GO:0090331	negative regulation of platelet aggregation	Any process that decreases the rate, frequency or extent of platelet aggregation. Platelet aggregation is the adhesion of one platelet to one or more other platelets via adhesion molecules.
	GO:0070495	negative regulation of thrombin-activated receptor signaling pathway	Any process that stops, prevents, or reduces the frequency, rate or extent of thrombin-activated receptor protein signaling pathway activity. A thrombin receptor signaling pathway is the series of molecular signals generated as a consequence of a thrombin-activated receptor binding to one of its physiological ligands.
cellular component
	GO:0005576	extracellular region	The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite.

Asymmetric Unit
	Complete Structure
		Jena3D(integrated viewing of ligand, site, SAP, PROSITE, SCOP information)
		WebMol \| AstexViewer[tm]@PDBe (Java Applets, require no local installation except for Java; loading may be slow)
		STRAP (Java WebStart application, automatic local installation, requires Java; full application with system access!)
		RasMol (require local installation)
		Molscript (VRML) (requires installation of a VRML viewer; select preferred view via VRML and generate a mono or stereo PDF format file)

	Ligands, Modified Residues, Ions
		SO4	[ RasMol \| Jena3D ]	+environment [ RasMol \| Jena3D ]

	Sites
		AC1	[ RasMol ]	+environment [ RasMol ]
		AC2	[ RasMol ]	+environment [ RasMol ]
		AC3	[ RasMol ]	+environment [ RasMol ]
		AC4	[ RasMol ]	+environment [ RasMol ]
		AC5	[ RasMol ]	+environment [ RasMol ]
		AC6	[ RasMol ]	+environment [ RasMol ]

	Cis Peptide Bonds
(no "Cis Peptide Bonds" information available for 1p2n)

Biological Units
	Complete Structure
		Biological Unit 1	[ Jena3D ]
		Biological Unit 2	[ Jena3D ]
		Biological Unit 3	[ Jena3D ]
		Biological Unit 4	[ Jena3D ]
		Biological Unit 5	[ Jena3D ]
		Biological Unit 6	[ Jena3D ]

Jmol
	protein: cartoon or spacefill or dots and stick; nucleic acid: cartoon and stick; ligands: spacefill; active site: stick [ Asym. Unit PNG format \| Asym. Unit - sites PNG format \| Biol. Unit 1 PNG format \| Biol. Unit 1 - sites PNG format \| Biol. Unit 2 PNG format \| Biol. Unit 3 PNG format \| Biol. Unit 4 PNG format \| Biol. Unit 5 PNG format \| Biol. Unit 6 PNG format ](automatic orientation, automatically generated)
Molscript
	protein, nucleic acid: cartoon; ligands: spacefill; active site: ball and stick [ mono PDF format \| stereo PDF format ](default orientation, automatically generated)

Access by PDB/NDB ID
	1p2n
		Family and Domain Information	:	ProDom \| SYSTERS
		General Structural Information	:	GlycoscienceDB \| MMDB \| NDB \| OCA \| PDB \| PDBe \| PDBj \| PDBsum \| PDBWiki \| PQS \| PROTEOPEDIA
		Orientation in Membranes	:	OPM
		Protein Surface	:	SURFACE
		Secondary Structure	:	DSSP (structure derived) \| HSSP (homology derived)
		Structural Genomics	:	GeneCensus
		Structural Neighbours	:	CE \| VAST
		Structure Classification	:	CATH \| Dali \| SCOP
		Validation and Original Data	:	BMRB Data View \| BMRB Restraints Grid \| EDS \| PROCHECK \| RECOORD \| WHAT_CHECK

Access by UniProt ID/Accession number
	BPT1_BOVIN \| P00974
		Comparative Protein Structure Models	:	ModBase
		Genomic Information	:	Ensembl
		Protein-protein Interaction	:	DIP
		Sequence, Family and Domain Information	:	InterPro \| Pfam \| SMART \| UniProtKB/SwissProt
	CTRA_BOVIN \| P00766
		Comparative Protein Structure Models	:	ModBase
		Genomic Information	:	Ensembl
		Protein-protein Interaction	:	DIP
		Sequence, Family and Domain Information	:	InterPro \| Pfam \| SMART \| UniProtKB/SwissProt

Access by Enzyme Classificator (EC Number)
	3.4.21.1
		General Enzyme Information	:	BRENDA \| EC-PDB \| Enzyme \| IntEnz
		Pathway	:	KEGG \| MetaCyc

Access by Disease Identifier (MIM ID)
	(no 'MIM ID' available)
		Disease Information	:	OMIM

Access by GenAge ID
	(no 'GenAge ID' available)
		Age Related Information	:	GenAge

Access by PDB/NDB ID
		Domain Information	:	XDom
		Interatomic Contacts of Structural Units	:	CSU
		Ligand-protein Contacts	:	LPC
		Protein Cavities	:	castP
		Sequence and Secondary Structure	:	PDBCartoon
		Structure Alignment	:	STRAP(Java WebStart application, automatic local installation, requires Java; full application with system access!)
		Structure and Sequence Browser	:	STING

Access by UniProt ID/Accession number
	BPT1_BOVIN \| P00974
		Protein Disorder Prediction	:	DisEMBL \| FoldIndex \| GLOBPLOT (for more information see DisProt)
	CTRA_BOVIN \| P00766
		Protein Disorder Prediction	:	DisEMBL \| FoldIndex \| GLOBPLOT (for more information see DisProt)

Description

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (1, 6)

Sites (6, 6)

SS Bonds (16, 16)

Cis Peptide Bonds (0, 0)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (0, 0)

PROSITE Motifs (5, 10)

Exons (0, 0)

Sequences/Alignments

Classification and Annotation

SCOP Domains (2, 4)

CATH Domains (2, 6)

Pfam Domains (2, 4)

Gene Ontology (16, 18)

Visualization

Interactive Views

Still Images

Databases and Analysis Tools

Databases

Analysis Tools

Related Entries

Entries Sharing at Least One Protein Chain (UniProt ID)

Related Entries Specified in the PDB File