Biological Assembly 1  

 3D View: Structure

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Global Symmetry: Cyclic - C3  (3D View)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 71478.31 
• Atom Count: 4265 
• Residue Count: 627 
• Unique protein chains: 1

1P32

CRYSTAL STRUCTURE OF HUMAN P32, A DOUGHNUT-SHAPED ACIDIC MITOCHONDRIAL MATRIX PROTEIN

• DOI: 10.2210/pdb1P32/pdb

• Classification: MITOCHONDRIAL MATRIX PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): 1 


• Deposited: 1998-11-02 Released: 1999-04-06 
• Deposition Author(s): Jiang, J., Zhang, Y., Krainer, A.R., Xu, R.-M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.25 Å
• R-Value Free: 0.234 
• R-Value Work: 0.173 

Literature

Crystal structure of human p32, a doughnut-shaped acidic mitochondrial matrix protein.

Jiang, J., Zhang, Y., Krainer, A.R., Xu, R.M.

(1999) Proc.Natl.Acad.Sci.USA 96: 3572-3577

• PubMed: 10097078 


• PubMed Abstract: 
  

Human p32 (also known as SF2-associated p32, p32/TAP, and gC1qR) is a conserved eukaryotic protein that localizes predominantly in the mitochondrial matrix. It is thought to be involved in mitochondrial oxidative phosphorylation and in nucleus-mitochondrion interactions. We report the crystal structure of p32 determined at 2.25 A resolution. The structure reveals that p32 adopts a novel fold with seven consecutive antiparallel beta-strands flanked by one N-terminal and two C-terminal alpha-helices. Three monomers form a doughnut-shaped quaternary structure with an unusually asymmetric charge distribution on the surface. The implications of the structure on previously proposed functions of p32 are discussed and new specific functional properties are suggested.

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Organizational Affiliation: 

W. M. Keck Structural Biology Laboratory, Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
MITOCHONDRIAL MATRIX PROTEIN, SF2P32	A, B, C	209	Homo sapiens	Mutation(s): 1  Gene Names: C1QBP (GC1QBP, HABP1, SF2P32)
Find proteins for Q07021 (Homo sapiens) Go to Gene View: C1QBP Go to UniProtKB:  Q07021

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.25 Å
• R-Value Free: 0.234 
• R-Value Work: 0.173 
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 58.625	α = 90.00
b = 56.481	β = 95.99
c = 93.831	γ = 90.00

Software Package:

Software Name	Purpose
DENZO	data reduction
CNS	phasing
X-PLOR	model building
SCALEPACK	data scaling
CNS	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1998-11-02 
• Released Date: 1999-04-06 
• Deposition Author(s): Jiang, J., Zhang, Y., Krainer, A.R., Xu, R.-M.

Revision History 

• Version 1.0: 1999-04-06
  Type: Initial release
• Version 1.1: 2008-04-26
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2018-03-14
  Type: Database references
• Version 1.4: 2018-08-29
  Type: Data collection, Source and taxonomy, Structure summary