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Description

Title :   STRUCTURE OF A MUTANT WINGED BEAN CHYMOTRYPSIN INHIBITOR PROTEIN, N14D.

Authors :   J. K. Dattagupta, C. Chakrabarti, S. Ravichandran, J. Dasgupta, S. Gho

Date :   19 Aug 00 (Deposition) - 19 Feb 01 (Release) - 13 Jul 11 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.00

Chains :   Asym. Unit : A
Biol. Unit 1: A  (1x)
Biol. Unit 2: A  (2x)
Biol. Unit 3: A  (2x)

Keywords :   Beta Trefoil, Hydrolase Inhibitor (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   S. Ravichandran, J. Dasgupta, C. Chakrabarti, S. Ghosh, M. Singh, J. K. Dattagupta
The Role Of Asn14 In The Stability And Conformation Of The Reactive-Site Loop Of Winged Bean Chymotrypsin Inhibitor: Crystal Structures Of Two Point Mutants Asn14-->Lys And Asn14-->Asp.
Protein Eng. V. 14 349 2001
PubMed-ID: 11438758 | Reference-DOI: 10.1093/PROTEIN/14.5.349
(for further references see the PDB file header)

Compounds

Molecule 1 - CHYMOTRYPSIN INHIBITOR 3
	Chains	:	A
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Plasmid	:	PTRC99A
	Expression System Taxid	:	562
	Expression System Vector Type	:	PLASMID
	Mutation	:	YES
	Organ	:	SEED
	Organism Common	:	WINGED BEAN
	Organism Scientific	:	PSOPHOCARPUS TETRAGONOLOBUS
	Organism Taxid	:	3891
	Synonym	:	WCI-3

Structural Features

Chains, Units

		1
Asymmetric Unit	:	A
Biological Unit 1 (1x)	:	A
Biological Unit 2 (2x)	:	A
Biological Unit 3 (2x)	:	A

Summary Information (see also Sequences/Alignments below)

Ligands, Modified Residues, Ions (1, 4)

Asymmetric Unit (1, 4)

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

Biological Unit 1 (1, 4)

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

Biological Unit 2 (1, 8)

No.	Name	Count	Type	Full Name
1	SO4	8	Ligand/Ion	SULFATE ION

Biological Unit 3 (1, 8)

No.	Name	Count	Type	Full Name
1	SO4	8	Ligand/Ion	SULFATE ION

Sites (4, 4)

Asymmetric Unit (4, 4)

No.	Name	Evidence	Residues	Description
1	AC1	SOFTWARE	HIS A:26 , ASN A:129	BINDING SITE FOR RESIDUE SO4 A 900
2	AC2	SOFTWARE	PRO A:25 , HIS A:26 , ILE A:27 , HIS A:30 , ARG A:50 , HIS A:127 , GLU A:172 , HOH A:331	BINDING SITE FOR RESIDUE SO4 A 902
3	AC3	SOFTWARE	SER A:69 , LEU A:70 , TRP A:93 , LYS A:111 , HOH A:246	BINDING SITE FOR RESIDUE SO4 A 904
4	AC4	SOFTWARE	HIS A:30 , SER A:126 , HIS A:127 , HOH A:268	BINDING SITE FOR RESIDUE SO4 A 905

SS Bonds (2, 2)

Asymmetric Unit

No.	Residues
1	A:44	-	A:88
2	A:138	-	A:147

Cis Peptide Bonds (0, 0)

(no "Cis Peptide Bond" information available for 1FN0)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (0, 0)

(no "SAP(SNP)/Variant" information available for 1FN0)

PROSITE Motifs (1, 1)

Asymmetric Unit (1, 1)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	SOYBEAN_KUNITZ	PS00283	Soybean trypsin inhibitor (Kunitz) protease inhibitors family signature.	ICW3_PSOTE	28-44	1	A:7-23

Biological Unit 1 (1, 1)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	SOYBEAN_KUNITZ	PS00283	Soybean trypsin inhibitor (Kunitz) protease inhibitors family signature.	ICW3_PSOTE	28-44	1	A:7-23

Biological Unit 2 (1, 2)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	SOYBEAN_KUNITZ	PS00283	Soybean trypsin inhibitor (Kunitz) protease inhibitors family signature.	ICW3_PSOTE	28-44	2	A:7-23

Biological Unit 3 (1, 2)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	SOYBEAN_KUNITZ	PS00283	Soybean trypsin inhibitor (Kunitz) protease inhibitors family signature.	ICW3_PSOTE	28-44	2	A:7-23

Exons (0, 0)

(no "Exon" information available for 1FN0)

Sequences/Alignments

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:177
 aligned with ICW3_PSOTE | P10822 from UniProtKB/Swiss-Prot  Length:207

    Alignment length:177
                                    34        44        54        64        74        84        94       104       114       124       134       144       154       164       174       184       194       
           ICW3_PSOTE    25 DDDLVDAEGNLVENGGTYYLLPHIWAHGGGIETAKTGNEPCPLTVVRSPNEVSKGEPIRISSQFLSLFIPRGSLVALGFANPPSCAASPWWTVVDSPQGPAVKLSQQKLPEKDILVFKFEKVSHSNIHVYKLLYCQHDEEDVKCDQYIGIHRDRNGNRRLVVTEENPLELVLLKAKS 201
               SCOP domains d1fn0a_ A: chymotrypsin inhibitor WCI                                                                                                                                             SCOP domains
               CATH domains 1fn0A00 A:4-180  [code=2.80.10.50, no name defined]                                                                                                                               CATH domains
               Pfam domains --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ................eeeeee.hhhhh..eeee.........eeee..........eeeee............eeeee............eee......eee......hhhhhh.eeeee........eeeeeeeee..eeeeeeeeeeee.....eeeeee.....eeeeee... Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE ---SOYBEAN_KUNITZ   ------------------------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 1fn0 A   4 DDDLVDAEGNLVEDGGTYYLLPHIWAHGGGIETAKTGNEPCPLTVVRSPNEVSKGEPIRISSQFLSLFIPRGSLVALGFANPPSCAASPWWTVVDSPQGPAVKLSQQKLPEKDILVFKFEKVSHSNIHVYKLLYCQHDEEDVKCDQYIGIHRDRNGNRRLVVTEENPLELVLLKAKS 180
                                    13        23        33        43        53        63        73        83        93       103       113       123       133       143       153       163       173

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	-	→ 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 '\|'

Classification and Annotation

SCOP Domains (1, 1)

Asymmetric Unit

Classes(

)

Folds(

)

Superfamilies( (-)

)

Families(

)

Protein Domains( (-)

)

Organisms( (-)

)

Class: All beta proteins (24004)

Fold: beta-Trefoil (385)

Superfamily: STI-like (91)

Family: Kunitz (STI) inhibitors (29)

Protein domain: chymotrypsin inhibitor WCI (8)

Winged bean (Psophocarpus tetragonolobus) [TaxId: 3891] (8)

d1fn0a_

CATH Domains (1, 1)

Asymmetric Unit

Classes(

)

Architectures( (-)

)

Topologies( (-)

)

Homologous Superfamilies( (-)

)

Organisms( (-)

)

Class: Mainly Beta (13760)

Architecture: Trefoil (289)

Topology: Trefoil (Acidic Fibroblast Growth Factor, subunit A) (289)

Homologous Superfamily: [code=2.80.10.50, no name defined] (289)

Winged bean (Psophocarpus tetragonolobus) (12)

1fn0A00

A:4-180

Pfam Domains (0, 0)

(no "Pfam Domain" information available for 1FN0)

Gene Ontology (5, 5)

Asymmetric Unit(hide GO term definitions)

Chain A (ICW3_PSOTE | P10822)

molecular function
	GO:0004866	endopeptidase inhibitor activity	Stops, prevents or reduces the activity of an endopeptidase, any enzyme that hydrolyzes nonterminal peptide bonds in polypeptides.
	GO:0030414	peptidase inhibitor activity	Stops, prevents or reduces the activity of a peptidase, any enzyme that catalyzes the hydrolysis peptide bonds.
	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.

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Related Entries

Entries Sharing at Least One Protein Chain (UniProt ID)

UniProtKB/Swiss-Prot
	ICW3_PSOTE \| P10822	:	1eyl 1fmz 1wbc 1xg6 2bea 2beb 2esu 2et2 2qyi 2wbc 3i29 3i2a 3i2x 3qyd 3veq 4h9w 4ha2 4tlp 4wbc

Related Entries Specified in the PDB File

1eyl	1EYL IS THE SAME PROTEIN IN RECOMBINANT FORM
1fmz	1FMZ CONTAINS THE SAME PROTEIN.
1wbc	1WBC IS THE CRYSTAL STRUCTURE OF THE SAME PROTEIN (NATIVE) AT 2.95A RESOLUTION
2wbc	2WBC IS THE CRYSTAL STRUCTURE OF THE SAME PROTEIN (NATIVE) AT 2.3A RESOLUTION
4wbc	4WBC IS THE CRYSTAL STRUCTURE OF THE SAME PROTEIN (NATIVE) AT 2.13A RESOLUTION