1AN1 Complex (Serine Protease Inhibitor) date Jun 26, 1997
title Leech-Derived Tryptase Inhibitortrypsin Complex
authors J.P.Priestle, S.Di Marco
compound source
Molecule: Trypsin
Chain: E
Synonym: Ldti
Engineered: Yes
Organism_scientific: Sus Scrofa
Organism_common: Pig
Organism_taxid: 9823
Organ: Pancreas

Molecule: Tryptase Inhibitor
Chain: I
Engineered: Yes
Mutation: Yes

Organism_scientific: Hirudo Medicinalis
Organism_common: Medicinal Leech
Organism_taxid: 6421
Organ: Salivary Glands
Expression_system: Saccharomyces Cerevisiae
Expression_system_common: Baker'S Yeast
Expression_system_taxid: 4932
Expression_system_strain: H449
Expression_system_variant: Tr1376, Tr1417
Expression_system_plasmid: Pdp34
symmetry Space Group: P 43 21 2
R_factor 0.170 R_Free 0.228
length a length b length c angle alpha angle beta angle gamma
63.700 63.700 130.860 90.00 90.00 90.00
method X-Ray Diffractionresolution 2.03 Å
ligand CA, DAS enzyme Hydrolase E.C. BRENDA
related structures by homologous chain: 1OVO, 1V2K, 1XUF

  • serine-type endopeptidase in...

  • Primary referenceStructure of the complex of leech-derived tryptase inhibitor (LDTI) with trypsin and modeling of the LDTI-tryptase system., Di Marco S, Priestle JP, Structure 1997 Nov 15;5(11):1465-74. PMID:9384562
    Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (48 Kb) [Save to disk]
  • Biological Unit Coordinates (1an1.pdb1.gz) 43 Kb
  • LPC: Ligand-Protein Contacts for 1AN1
  • CSU: Contacts of Structural Units for 1AN1
  • Likely Quarternary Molecular Structure file(s) for 1AN1
  • Structure Factors (138 Kb)
  • Retrieve 1AN1 in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 1AN1 from S2C, [Save to disk]
  • Re-refined 1an1 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 1AN1 in 3D
  • Proteopedia, because life has more than 2D.
  • On Jmol, a nice Rasmol like molecule viewer. This is good for easiest viewing of basic structure.
  • On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz.
  • Visual 3D analysis of 1AN1
  • Cartoon representation from PDB Cartoon
  • Ramachandran plot from PDBSum
  • Structure-derived information
  • Electron Density related parameters from EDS Electron Density Server, at Upsala
  • Dipole moment, from Dipole Server at Weizmann Institute
  • Crystal Contacts, from CryCo at Weizmann Institute
  • 3D motif for 1AN1, from MSDmotif at EBI
  • Genome occurence of 1AN1's fold from GeneCensus
  • Classification of representative domains in scop (Structural Classification of Proteins)
        - Domain d1an1e_, region E [Jmol] [rasmolscript] [script source]
        - Domain d1an1i_, region I [Jmol] [rasmolscript] [script source]
  • Fold representative 1an1 from FSSP and Dali (Families of Structurally Similar Proteins)
  • Class (fold), Architecture (subfold), Topology, Homologous superfamily from CATH
  • Summaries and structural analyses of PDB data files from PDBSum
  • Identification of Protein Pockets & Cavities at CASTp
  • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [1an1_E] [1an1] [1an1_I]
  • SWISS-PROT database: [P80424] [P00761]
  • Domain organization of [LDTI_HIRME] [TRYP_PIG] by SWISSPFAM
  • Domains found in 1AN1: [KAZAL] [Tryp_SPc ] by SMART
  • Other resources with information on 1AN1
  • Community annotation for 1AN1 at PDBWiki (http://pdbwiki.org)
  • MMDB (Entrez's Structure Database)
  • Movements, Movies and Images
  • Images from IMB Jena Image Library of Biological Macromolecules.

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