1C3G

S. CEREVISIAE HEAT SHOCK PROTEIN 40 SIS1

• PDB DOI:  https://doi.org/10.2210/pdb1C3G/pdb

• Classification: CHAPERONE
• Organism(s): Saccharomyces cerevisiae
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1999-07-27 Released: 2000-08-03 
• Deposition Author(s): Sha, B., Lee, S., Cyr, D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.311 
• R-Value Work: 0.265 
• R-Value Observed: 0.265 

Literature

The crystal structure of the peptide-binding fragment from the yeast Hsp40 protein Sis1.

Sha, B., Lee, S., Cyr, D.M.

(2000) Structure 8: 799-807

• PubMed: 10997899 
• DOI: https://doi.org/10.1016/s0969-2126(00)00170-2
• Primary Citation of Related Structures:  
  1C3G


• PubMed Abstract: 
  

Molecular chaperone Hsp40 can bind non-native polypeptide and facilitate Hsp70 in protein refolding. How Hsp40 and other chaperones distinguish between the folded and unfolded states of proteins to bind nonnative polypeptides is a fundamental issue.

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Organizational Affiliation: 

Center for Macromolecular Crystallography, University of Alabama at Birmingham, 35294-0005, USA. [e-mail]

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 19.1 kDa 
• Atom Count: 1,379 
• Modelled Residue Count: 170 
• Deposited Residue Count: 170 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HEAT SHOCK PROTEIN 40	A	170	Saccharomyces cerevisiae	Mutation(s): 0
UniProt
Find proteins for P25294 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P25294  Go to UniProtKB:  P25294

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.311 
• R-Value Work: 0.265 
• R-Value Observed: 0.265 
• Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 73.42	α = 90
b = 73.42	β = 90
c = 80.09	γ = 90

Software Package:

Software Name	Purpose
MADSYS	phasing
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2000-08-03 
Deposition Author(s): Sha, B., Lee, S., Cyr, D.

Revision History  

• Version 1.0: 2000-08-03
  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: 2018-01-31
  Changes: Experimental preparation