ISDA

Deposition Date 1993-04-20

Release Date 1993-10-31

Last Version Date 2024-02-07

Entry Detail

PDB ID:

1FCS

Keywords:

OXYGEN TRANSPORT

Title:

CRYSTAL STRUCTURE OF A DISTAL SITE DOUBLE MUTANT OF SPERM WHALE MYOGLOBIN AT 1.6 ANGSTROMS RESOLUTION

Biological Source:

Source Organism:

Physeter catodon (Taxon ID: 9755)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.60 Å

R-Value Observed:

0.19

Space Group:

P 6

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:MYOGLOBIN
Gene (Uniprot):MB
Chain IDs:A
Chain Length:154
Number of Molecules:1
Biological Source:Physeter catodon

UniProt ID:P02185 Pfam ID:PF00042

Ligand Molecules

HEM

SO4

Primary Citation

Crystal structure of a distal site double mutant of sperm whale myoglobin at 1.6 A resolution.

Rizzi, M, Bolognesi, M, Coda, A, Cutruzzola, F, Allocatelli, C.T, Brancaccio, A, Brunori, M, Cutruzzola, F, Allocatelli, C.T, Ascenzi, P, Bolognesi, M, Sligar, S.G, Brunori, M, Mattevi, A, Gatti, G, Coda, A, Rizzi, M, Ascenzi, P, Brunori, M, Bolognesi, M.Show

FEBS Lett. 320 13 16 (1993)

PMID: 8462669 DOI: 10.1016/0014-5793(93)81647-I

Abstact

The three-dimensional structure of sperm whale myoglobin His64(E7)-->Val,Thr67(E10)-->Arg double mutant has been studied by X-ray crystallography at 1.6 A resolution, and refined to a crystallographic R-factor of 0.197. The Arg67(E10) side chain is extended in the direction of the ligand binding site, and its NH1 atom is at a distance of 3.11 A from the NH1 atom of Arg45(CD3), which is also pointing towards the distal site. Both are kept in this position by hydrogen bonding and electrostatic interactions with a solvent sulfate ion, located amongst the two, on the protein surface. No liganded water molecule is present at the sixth coordination position of the Fe(III) heme.

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Primary Citation of related structures