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(-) Description

Title :  HIRUSTASIN FROM HIRUDO MEDICINALIS AT 1.2 ANGSTROMS
 
Authors :  I. Uson, G. M. Sheldrick, E. De La Fortelle, G. Bricogne, S. Di Marco, J. P. Priestle, M. G. Gruetter, P. R. E. Mittl
Date :  14 Oct 98  (Deposition) - 27 Apr 99  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.20
Chains :  Asym./Biol. Unit :  A
Keywords :  Anti-Coagulant, Peptidic Inhibitors, Conformational Flexibility, Serine Protease Inhibitor (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  I. Uson, G. M. Sheldrick, E. De La Fortelle, G. Bricogne, S. Di Marco, J. P. Priestle, M. G. Grutter, P. R. Mittl
The 1. 2 A Crystal Structure Of Hirustasin Reveals The Intrinsic Flexibility Of A Family Of Highly Disulphide-Bridged Inhibitors.
Structure Fold. Des. V. 7 55 1999
PubMed-ID: 10368273  |  Reference-DOI: 10.1016/S0969-2126(99)80009-4
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - HIRUSTASIN
    Chains: A
    Engineered: YES
    Expression System: SACCHAROMYCES CEREVISIAE
    Expression System Common: BAKER'S YEAST
    Expression System Taxid: 4932
    Organism Common: MEDICINAL LEECH
    Organism Scientific: HIRUDO MEDICINALIS
    Organism Taxid: 6421

 Structural Features

(-) Chains, Units

  1
Asymmetric/Biological Unit : A

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (1, 2)

Asymmetric/Biological Unit (1, 2)
No.NameCountTypeFull Name
1SO42Ligand/IonSULFATE ION

(-) Sites  (2, 2)

Asymmetric Unit (2, 2)
No.NameEvidenceResiduesDescription
1AC1SOFTWAREARG A:30 , LYS A:38 , ALA A:51 , LYS A:52 , ALA A:53 , HOH A:112BINDING SITE FOR RESIDUE SO4 A 100
2AC2SOFTWAREHIS A:28 , ARG A:30 , LYS A:38 , LYS A:52 , HOH A:139BINDING SITE FOR RESIDUE SO4 A 101

(-) SS Bonds  (5, 5)

Asymmetric/Biological Unit
No.Residues
1A:6 -A:17
2A:11 -A:22
3A:24 -A:44
4A:29 -A:48
5A:33 -A:50

(-) Cis Peptide Bonds  (1, 1)

Asymmetric/Biological Unit
No.Residues
1Tyr A:46 -Pro A:47

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1BX7)

(-) PROSITE Motifs  (1, 1)

Asymmetric/Biological Unit (1, 1)
 PROSITEUniProtKBPDB
No.IDACDescriptionIDLocationCountLocation
1ANTISTASINPS51252 Antistasin-like domain profile.ANTA_HIRME24-50  1A:24-50

(-) Exons   (0, 0)

(no "Exon" information available for 1BX7)

(-) Sequences/Alignments

Asymmetric/Biological 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    
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SAPs(SNPs) PROSITE motifs Exons
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Chain A from PDB  Type:PROTEIN  Length:51
 aligned with ANTA_HIRME | P80302 from UniProtKB/Swiss-Prot  Length:55

    Alignment length:51
                                    12        22        32        42        52 
            ANTA_HIRME    3 GNTCGGETCSAAQVCLKGKCVCNEVHCRIRCKYGLKKDENGCEYPCSCAKA 53
               SCOP domains d1bx7a_ A: Hirustasin                               SCOP domains
               CATH domains 1bx7A00 A:3-53 Antistasin; domain 1                 CATH domains
               Pfam domains --------------------------------------------------- Pfam domains
         Sec.struct. author ............eeee..eeee............................. Sec.struct. author
                 SAPs(SNPs) --------------------------------------------------- SAPs(SNPs)
                    PROSITE ---------------------ANTISTASIN  PDB: A:24-50   --- PROSITE
                 Transcript --------------------------------------------------- Transcript
                  1bx7 A  3 GNTCGGETCSAAQVCLKGKCVCNEVHCRIRCKYGLKKDENGCEYPCSCAKA 53
                                    12        22        32        42        52
   Legend:   → Mismatch (orange background)
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 Classification and Annotation

(-) SCOP Domains  (1, 1)

Asymmetric/Biological Unit
(-)
Class: Small proteins (3458)

(-) CATH Domains  (1, 1)

Asymmetric/Biological Unit
(-)
Class: Mainly Beta (13760)

(-) Pfam Domains  (0, 0)

(no "Pfam Domain" information available for 1BX7)

(-) Gene Ontology  (8, 8)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A   (ANTA_HIRME | P80302)
molecular function
    GO:0004857    enzyme inhibitor activity    Binds to and stops, prevents or reduces the activity of an enzyme.
    GO:0008201    heparin binding    Interacting selectively and non-covalently with heparin, any member of a group of glycosaminoglycans found mainly as an intracellular component of mast cells and which consist predominantly of alternating alpha-(1->4)-linked D-galactose and N-acetyl-D-glucosamine-6-sulfate residues.
    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:0050819    negative regulation of coagulation    Any process that stops, prevents, or reduces the frequency, rate or extent of coagulation.
    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.
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.

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 Related Entries

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        ANTA_HIRME | P80302: 1bx8 1hia

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