2AYW

Crystal Structure of the complex formed between trypsin and a designed synthetic highly potent inhibitor in the presence of benzamidine at 0.97 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.97 Å
  • R-Value Free: 0.157 
  • R-Value Work: 0.134 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure of the complex of trypsin with a highly potent synthetic inhibitor at 0.97 A resolution.

Sherawat, M.Kaur, P.Perbandt, M.Betzel, C.Slusarchyk, W.A.Bisacchi, G.S.Chang, C.Jacobson, B.L.Einspahr, H.M.Singh, T.P.

(2007) Acta Crystallogr.,Sect.D 63: 500-507

  • DOI: 10.1107/S090744490700697X

  • PubMed Abstract: 
  • The structure of the complex formed between bovine beta-trypsin and the highly potent synthetic inhibitor 2-{3'-[5'-methoxy-2'-(N-p-diaminomethylphenyl)amido]-1'-pyrido}-5-(N-2''-t-butylethanol)amidobenzoic acid (C(28)H(32)N(5)O(6)) has been determin ...

    The structure of the complex formed between bovine beta-trypsin and the highly potent synthetic inhibitor 2-{3'-[5'-methoxy-2'-(N-p-diaminomethylphenyl)amido]-1'-pyrido}-5-(N-2''-t-butylethanol)amidobenzoic acid (C(28)H(32)N(5)O(6)) has been determined at 0.97 A resolution. X-ray intensity data were collected to 0.97 A under cryocooled conditions. The structure was refined anisotropically using REFMAC5 and SHELX-97 to R(cryst) factors of 13.4 and 12.6% and R(free) factors of 15.7 and 16.3%, respectively. Several regions of the main chain and side chains that have not been previously observed were clearly defined in the present structure. H atoms are indicated as significant peaks in an |F(o) - F(c)| difference map, which accounts for an estimated 35% of all H atoms at the 2.5sigma level. The C, N and O atoms are definitively differentiated in the electron-density maps. The amido part of the inhibitor occupies the specificity pocket and the remainder fills the remaining part of the ligand-binding cleft and interacts with the enzyme through an extensive network of hydrogen bonds. The inhibitor distorts the stereochemistry of the catalytic triad, Ser195-His57-Asp102, thereby blocking the proton-relay process of the active site by preventing the formation of the crucial hydrogen bond between His57 N(delta1) and Asp102 O(delta1).


    Organizational Affiliation

    Department of Biophysics, All India Institute of Medical Sciences, New Delhi 110029, India.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cationic trypsin
A
223Bos taurusEC: 3.4.21.4
Find proteins for P00760 (Bos taurus)
Go to UniProtKB:  P00760
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ONO
Query on ONO

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Download CCD File 
A
2-[2-({[4-(DIAMINOMETHYL)PHENYL]AMINO}CARBONYL)-6-METHOXYPYRIDIN-3-YL]-5-{[(1-FORMYL-2,2-DIMETHYLPROPYL)AMINO]CARBONYL}BENZOIC ACID
C28 H31 N5 O6
XTFRBCPDFSHPBF-OAQYLSRUSA-N
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

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A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MES
Query on MES

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Download CCD File 
A
2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
 Ligand Interaction
BEN
Query on BEN

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Download CCD File 
A
BENZAMIDINE
C7 H8 N2
PXXJHWLDUBFPOL-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
BDNKi: 31 - 39000 nM (100) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.97 Å
  • R-Value Free: 0.157 
  • R-Value Work: 0.134 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 68.550α = 90.00
b = 68.550β = 90.00
c = 73.330γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
AMoREphasing
XDSdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-01-17
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance
  • Version 1.3: 2017-10-11
    Type: Refinement description