1BA0

HEAT-SHOCK COGNATE 70KD PROTEIN 44KD ATPASE N-TERMINAL 1NGE 3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural replacement of active site monovalent cations by the epsilon-amino group of lysine in the ATPase fragment of bovine Hsc70.

Wilbanks, S.M.McKay, D.B.

(1998) Biochemistry 37: 7456-7462

  • DOI: 10.1021/bi973046m
  • Primary Citation of Related Structures:  1BA1

  • PubMed Abstract: 
  • We have assessed the ability of the epsilon-amino group of a non-native lysine chain to substitute for a monovalent cation in an enzyme active site. In the bovine Hsc70 ATPase fragment, mutation of cysteine 17 or aspartic acid 206 to lysine potential ...

    We have assessed the ability of the epsilon-amino group of a non-native lysine chain to substitute for a monovalent cation in an enzyme active site. In the bovine Hsc70 ATPase fragment, mutation of cysteine 17 or aspartic acid 206 to lysine potentially allows the replacement of an active site potassium ion with the epsilon-amino nitrogen. We examined the ATP hydrolysis kinetics and crystal structures of isolated mutant ATPase domains. The introduced epsilon-amino nitrogen in the C17K mutant occupies a significantly different position than the potassium ion. The introduced epsilon-amino nitrogen in the D206K mutant occupies a position indistinguishable from that of the potassium in the wild-type structure. Each mutant retains <5% ATPase activity when compared to the wild type under physiological conditions (potassium buffer) although substrate binding is tighter, probably as a consequence of slower release. It is possible to construct a very good structural mimic of bound cation which suffices for substrate binding but not for catalytic activity.


    Related Citations: 
    • Structural Basis of the 70-Kilodalton Heat Shock Cognate Protein ATP Hydrolytic Activity. II. Structure of the Active Site with Adp or ATP Bound to Wild Type and Mutant ATPase Fragment
      Flaherty, K.M.,Wilbanks, S.M.,Deluca-Flaherty, C.,Mckay, D.B.
      (1994) J.Biol.Chem. 269: 12899
    • Three-Dimensional Structure of the ATPase Fragment of a 70K Heat-Shock Cognate Protein
      Flaherty, K.M.,Deluca-Flaherty, C.,Mckay, D.B.
      (1990) Nature 346: 623


    Organizational Affiliation

    Beckman Laboratories for Structural Biology, Department of Structural Biology, Stanford University School of Medicine, California 94305-5400, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HEAT-SHOCK COGNATE 70KD PROTEIN
A
386Bos taurusGene Names: HSPA8 (HSC70)
Find proteins for P19120 (Bos taurus)
Go to Gene View: HSPA8
Go to UniProtKB:  P19120
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

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A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
NA
Query on NA

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A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
ADP
Query on ADP

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A
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
CL
Query on CL

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A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

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A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
ADPIC50: 280 nM (99) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.216 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 143.300α = 90.00
b = 63.800β = 90.00
c = 46.500γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
DENZOdata reduction
X-PLORmodel building
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-07-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance