ISDA

Entry Detail

PDB ID:

1BZP

Keywords:

OXYGEN STORAGE

Title:

ATOMIC RESOLUTION CRYSTAL STRUCTURE ANALYSIS OF NATIVE DEOXY AND CO MYOGLOBIN FROM SPERM WHALE AT ROOM TEMPERATURE

Biological Source:

Source Organism:

Physeter catodon

PDB Version:

Deposition Date:

1998-11-02

Release Date:

1999-05-10

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.15 Å

R-Value Observed:

0.11

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:PROTEIN (MYOGLOBIN)
Chain IDs:A
Chain Length:153
Number of Molecules:1
Biological Source:Physeter catodon

UniProt ID:P02185 Pfam ID:PF00042

Ligand Molecules

HEM

SO4

Primary Citation

A steric mechanism for inhibition of CO binding to heme proteins.

Kachalova, G.S, Popov, A.N, Bartunik, H.D.Show

Science 284 473 476 (1999)

PMID: 10205052 DOI: 10.1126/science.284.5413.473

Abstact

The crystal structures of myoglobin in the deoxy- and carbon monoxide-ligated states at a resolution of 1.15 angstroms show that carbon monoxide binding at ambient temperatures requires concerted motions of the heme, the iron, and helices E and F for relief of steric inhibition. These steps constitute the main mechanism by which heme proteins lower the affinity of the heme group for the toxic ligand carbon monoxide.

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Primary Citation of related structures