ISDA

Deposition Date 2013-06-04

Release Date 2013-06-12

Last Version Date 2024-11-20

Entry Detail

PDB ID:

4L2M

Keywords:

UNKNOWN FUNCTION

Title:

Crystal structure of the 2/2 hemoglobin from Synechococcus sp. PCC 7002 in the cyanomet state and with covalently attached heme

Biological Source:

Source Organism:

Synechococcus sp. (Taxon ID: 32049)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.25 Å

R-Value Free:

0.28

R-Value Work:

0.21

R-Value Observed:

0.22

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Cyanoglobin
Gene (Uniprot):glbN
Chain IDs:A, B
Chain Length:123
Number of Molecules:2
Biological Source:Synechococcus sp.

UniProt ID:Q8RT58 Pfam ID:PF01152

Ligand Molecules

CYN

HEB

SO4

Primary Citation

The 2/2 hemoglobin from the cyanobacterium Synechococcus sp. PCC 7002 with covalently attached heme: Comparison of X-ray and NMR structures.

Wenke, B.B, Lecomte, J.T, Heroux, A, Schlessman, J.L.Show

Proteins 82 528 534 (2014)

PMID: 23999883 DOI: 10.1002/prot.24409

Abstact

The X-ray structures of the hemoglobin from Synechococcus sp. PCC 7002 (GlbN) were solved in the ferric bis-histidine (1.44 Å resolution) and cyanide-bound (2.25 Å resolution) states with covalently attached heme. The two structures illustrate the conformational changes and cavity opening caused by exogenous ligand binding. They also reveal an unusually distorted heme, ruffled as in c cytochromes. Comparison to the solution structure demonstrates the influence of crystal packing on several structural elements, whereas comparison to GlbN from Synechocystis sp. PCC 6803 shows subtle differences in heme geometries and environment. The new structures will be instrumental in elucidating GlbN reactivity.

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Primary Citation of related structures