Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 90792.25 
• Atom Count: 5278 
• Residue Count: 798 
• Unique protein chains: 1

1HIW

TRIMERIC HIV-1 MATRIX PROTEIN

• DOI: 10.2210/pdb1HIW/pdb

• Classification: MATRIX PROTEIN
• Organism(s): Human immunodeficiency virus type 1 group M subtype B
• Expression System: Escherichia coli


• Deposited: 1996-02-28 Released: 1996-10-14 
• Deposition Author(s): Hill, C.P., Worthylake, D., Bancroft, D.P., Christensen, A.M., Sundquist, W.I.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• R-Value Free: 0.332 
• R-Value Work: 0.259 

Literature

Crystal structures of the trimeric human immunodeficiency virus type 1 matrix protein: implications for membrane association and assembly.

Hill, C.P., Worthylake, D., Bancroft, D.P., Christensen, A.M., Sundquist, W.I.

(1996) Proc.Natl.Acad.Sci.USA 93: 3099-3104

• PubMed: 8610175 


• PubMed Abstract: 
  

The human immunodeficiency virus type 1 (HIV-1) matrix protein forms a structural shell associated with the inner viral membrane and performs other essential functions throughout the viral life cycle. The crystal structure of the HIV-1 matrix protein, determined at 2.3 angstrom resolution, reveals that individual matrix molecules are composed of five major helices capped by a three-stranded mixed beta-sheet. Unexpectedly, the protein assembles into a trimer in three different crystal lattices, burying 1880 angstrom2 of accessible surface area at the trimer interfaces. Trimerization appears to create a large, bipartite membrane binding surface in which exposed basic residues could cooperate with the N-terminal myristoyl groups to anchor the protein on the acidic inner membrane of the virus.

---

Organizational Affiliation: 

Department of Biochemistry, University of Utah, Salt Lake City, 84132, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
HIV-1 MATRIX PROTEIN	A, B, C, Q, R, S	133	Human immunodeficiency virus type 1 group M subtype B	Mutation(s): 0  Gene Names: gag-pol
Find proteins for P12497 (Human immunodeficiency virus type 1 group M subtype B) Go to UniProtKB:  P12497

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
SO4	A, B, C, Q, R, S	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• R-Value Free: 0.332 
• R-Value Work: 0.259 
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 64.423	α = 90.00
b = 91.163	β = 102.91
c = 73.997	γ = 90.00

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1996-02-28 
• Released Date: 1996-10-14 
• Deposition Author(s): Hill, C.P., Worthylake, D., Bancroft, D.P., Christensen, A.M., Sundquist, W.I.

Revision History 

• Version 1.0: 1996-10-14
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance