1IFG - JenaLib

Title :   CRYSTAL STRUCTURE OF A MONOMERIC FORM OF GENERAL PROTEASE INHIBITOR, ECOTIN IN ABSENCE OF A PROTEASE

Authors :   C. T. Eggers, S. X. Wang, R. J. Fletterick, C. S. Craik

Date :   12 Apr 01 (Deposition) - 18 May 01 (Release) - 16 Nov 11 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.00

Chains :   Asym./Biol. Unit : A

Keywords :   Monomeric Ecotin, Serine Protease Inhibitor, Hydrolase Inhibitor (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   C. T. Eggers, S. X. Wang, R. J. Fletterick, C. S. Craik
The Role Of Ecotin Dimerization In Protease Inhibition.
J. Mol. Biol. V. 308 975 2001
PubMed-ID: 11352586 | Reference-DOI: 10.1006/JMBI.2001.4754

Compounds

Molecule 1 - ECOTIN
	Chains	:	A
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI
	Expression System Plasmid	:	PTACTAC
	Expression System Strain	:	JM101
	Expression System Taxid	:	562
	Expression System Vector Type	:	PLASMID
	Fragment	:	RESIDUES 26-162 OF ECOTIN PRECURSOR
	Gene	:	ECO OR ETI OR B2209
	Mutation	:	YES
	Organism Scientific	:	ESCHERICHIA COLI
	Organism Taxid	:	562
	Other Details	:	MONOMERIC FORM

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (0, 0)

Sites (0, 0)

SS Bonds (1, 1)

Cis Peptide Bonds (0, 0)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (0, 0)

PROSITE Motifs (0, 0)

Exons (0, 0)

Sequences/Alignments

Asymmetric/Biological Unit

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

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Chain A from PDB  Type:PROTEIN  Length:140
 aligned with ECOT_ECOLI | P23827 from UniProtKB/Swiss-Prot  Length:162

    Alignment length:140
                                                                                                                                                      150 151           
                                    35        45        55        65        75        85        95       105       115       125       135       145    |  152       162
          ECOT_ECOLI     26 PLEKIAPYPQAEKGMKRQVIQLTPQEDESTLKVELLIGQTLEVDCNLHRLGGKLENKTLEGWGYDYYVFDKVSSPVSTMMACPDGKKEKKFVTAYLGDAGMLRYNSKLPIVVYTPDNVDVKYRVW---KAEEKIDNAVVR  162
               SCOP domains d1ifga_ A: Ecotin, trypsin inhibitor                                                                                                         SCOP domains
               CATH domains 1ifgA00 A:6-142  [code=2.60.40.550, no name defined]                                                                                         CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author hhhhh.........eeeeee......hhh..................eeeeeeeeeee......eeeeeeeeeeeee..................hhhh..........eeeeee......................ee. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------------------------------------------------------------------------------------------------------------------------------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                1ifg A    6 PLEKIAPYPQAEKGMKRQVIQLTPQEDESTLKVELLIGQTLEVDCNLHRLGGKLENKTLEGWGYDYYVFDKVSSPVSTMMACPDGKKEKKFVTAYLGDAGMLRYNSKLPIVVYTPDNVDVKYRVWADGKAEEKIDNAVVR  142
                                    15        25        35        45        55        65        75        85        95       105       115       125     ||132       142
                                                                                                                                                      130A||            
                                                                                                                                                       130B|            
                                                                                                                                                        130C

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Classification and Annotation

SCOP Domains (1, 1)

CATH Domains (1, 1)

Pfam Domains (0, 0)

Gene Ontology (7, 7)

Asymmetric/Biological Unit(hide GO term definitions)

Chain A (ECOT_ECOLI | P23827)

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: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.
cellular component
	GO:0030288	outer membrane-bounded periplasmic space	The region between the inner (cytoplasmic or plasma) membrane and outer membrane of organisms with two membranes such as Gram negative bacteria. These periplasmic spaces are relatively thick and contain a thin peptidoglycan layer (PGL), also referred to as a thin cell wall.
	GO:0042597	periplasmic space	The region between the inner (cytoplasmic) and outer membrane (Gram-negative Bacteria) or cytoplasmic membrane and cell wall (Fungi and Gram-positive Bacteria).

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