1DM4

SER195ALA MUTANT OF HUMAN THROMBIN COMPLEXED WITH FIBRINOPEPTIDE A (7-16)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Observed: 0.169 

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This is version 1.5 of the entry. See complete history. 


Literature

Structure of the Ser195Ala mutant of human alpha--thrombin complexed with fibrinopeptide A(7--16): evidence for residual catalytic activity.

Krishnan, R., Sadler, J.E., Tulinsky, A.

(2000) Acta Crystallogr D Biol Crystallogr 56: 406-410

  • DOI: 10.1107/s0907444900001487
  • Primary Citation of Related Structures:  
    1DM4

  • PubMed Abstract: 

    • The Ser195Ala mutant of human alpha-thrombin was complexed with fibrinopeptide A(7-22) (FPA) in an effort to describe the (P1'-P6') post-cleavage binding subsites of the fibrinogen-recognition exosite and define more clearly the nature of the Michaelis complex and the scissile peptide bond bound at the catalytic site ...

    The Ser195Ala mutant of human alpha-thrombin was complexed with fibrinopeptide A(7-22) (FPA) in an effort to describe the (P1'-P6') post-cleavage binding subsites of the fibrinogen-recognition exosite and define more clearly the nature of the Michaelis complex and the scissile peptide bond bound at the catalytic site. The thrombin mutant, however, has residual catalytic activity and proteolysis occurred at the Arg16-Gly17 bond. Thus, the structure of the thrombin complex determined was that of FPA(7-16) bound at the active site, which is very similar to the ternary FPA(7-16)cmk-human thrombin-hirugen complex (r.m.s.d. approximately 0.4 A; Stubbs et al. , 1992). It is further shown by subsidiary experiments that the cleavage is the result of residual catalytic activity of the altered catalytic machinery.

    Organizational Affiliation: 

    Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (ALPHA THROMBIN:LIGHT CHAIN)A35Homo sapiensMutation(s): 0 
Gene Names: F2
EC: 3.4.21.5
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Go to UniProtKB:  P00734
PHAROS:  P00734
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UniProt GroupP00734
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (MUTANT ALPHA THROMBIN:HEAVY CHAIN)B260Homo sapiensMutation(s): 1 
Gene Names: F2
EC: 3.4.21.5
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PHAROS:  P00734
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UniProt GroupP00734
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (FIBRINOPEPTIDE)C11N/AMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P02671 (Homo sapiens)
Explore P02671 
Go to UniProtKB:  P02671
PHAROS:  P02671
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UniProt GroupP02671
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Observed: 0.169 
  • Space Group: I 21 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 135.1α = 90
b = 135.1β = 90
c = 135.1γ = 90
Software Package:
Software NamePurpose
AMoREphasing
PROFFTrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-01-19
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2011-09-07
    Changes: Structure summary
  • Version 1.4: 2017-10-04
    Changes: Refinement description
  • Version 1.5: 2018-03-14
    Changes: Database references