Biological Assembly 1  

 3D View: Structure

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Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 30432.25 
• Atom Count: 1718 
• Residue Count: 264 
• Unique protein chains: 1

3ULL

HUMAN MITOCHONDRIAL SINGLE-STRANDED DNA BINDING PROTEIN

• DOI: 10.2210/pdb3ULL/pdb

• Classification: DNA BINDING PROTEIN
• Organism(s): Homo sapiens


• Deposited: 1996-12-11 Released: 1997-10-15 
• Deposition Author(s): Yang, C., Curth, U., Urbanke, C., Kang, C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.4 Å
• R-Value Free: 0.237 
• R-Value Work: 0.195 

Literature

Crystal structure of human mitochondrial single-stranded DNA binding protein at 2.4 A resolution.

Yang, C., Curth, U., Urbanke, C., Kang, C.

(1997) Nat.Struct.Mol.Biol. 4: 153-157

• PubMed: 9033597 
• Also Cited By: 3AFQ, 3AFP


• PubMed Abstract: 
  

We solved the crystal structure of the homotetrameric single-stranded DNA binding (SSB) protein from human mitochondria at a resolution of 2.4 A. The tetramer is formed by two dimers interacting head-to-head and shows D2 symmetry. Sequence-related tetrameric SSB proteins occur in prokaryotes and eukaryotic mitochondria; this is the first report of an atomic resolution structure of this type of protein. Using biochemical data and analysis of sequence homologies, we were able to correlate the functional properties with structure. We propose that ssDNA wraps around the tetrameric HsmtSSB protein through electropositive channels guided by flexible loops.

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Organizational Affiliation: 

Department of Biochemistry and Biophysics, Washington State University, Pullman 99164-4660, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
DNA BINDING PROTEIN	A, B	132	Homo sapiens	Mutation(s): 0  Gene Names: SSBP1 (SSBP)
Find proteins for Q04837 (Homo sapiens) Go to Gene View: SSBP1 Go to UniProtKB:  Q04837

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.4 Å
• R-Value Free: 0.237 
• R-Value Work: 0.195 
• Space Group: P 4₁ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 51.830	α = 90.00
b = 51.830	β = 90.00
c = 184.240	γ = 90.00

Software Package:

Software Name	Purpose
BIOTEX	data scaling
PHASES	phasing
X-PLOR	phasing
BIOTEX	data reduction
X-PLOR	model building
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1996-12-11 
• Released Date: 1997-10-15 
• Deposition Author(s): Yang, C., Curth, U., Urbanke, C., Kang, C.

Revision History 

• Version 1.0: 1997-10-15
  Type: Initial release
• Version 1.1: 2008-03-25
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance