ISDA: 2J8K

Deposition Date 2006-10-25

Release Date 2006-12-07

Last Version Date 2023-12-13

Entry Detail

PDB ID:

2J8K

Keywords:

TOXIN

Title:

Structure of the fusion of NP275 and NP276, pentapeptide repeat proteins from Nostoc punctiforme

Biological Source:

Source Organism:

NOSTOC PUNCTIFORME (Taxon ID: 272131)

Host Organism:

ESCHERICHIA COLI

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.50 Å

R-Value Free:

0.18

R-Value Work:

0.17

R-Value Observed:

0.17

Space Group:

P 21 21 21

Download Validation Report

Macromolecular Entities

Polymer Type:polypeptide(L)
Molecule:NP275-NP276
Chain IDs:A
Chain Length:201
Number of Molecules:1
Biological Source:NOSTOC PUNCTIFORME

Ligand Molecules

MES

SO4

Primary Citation

Structural Characterization of the Fusion of Two Pentapeptide Repeat Proteins, Np275 and Np276, from Nostoc Punctiforme: Resurrection of an Ancestral Protein.

Vetting, M.W, Hegde, S.S, Hazleton, K.Z, Blanchard, J.S.Show

Protein Sci. 16 755 ? (2007)

PMID: 17384236 DOI: 10.1110/PS.062637707

Abstact

The Nostoc punctiforme genes Np275 and Np276 are two adjacently encoded proteins of 98 and 75 amino acids in length and exhibit sequences composed of tandem pentapeptide repeats. The structures of Np275 and a fusion of Np275 and Np276 were determined to 2.1 and 1.5 A, respectively. The two Nostoc proteins fold as highly symmetric right-handed quadrilateral beta-helices similar to the mycobacterial protein MfpA implicated in fluoroquinolone resistance and DNA gyrase inhibition. The sequence composition of the intervening coding region and the ability to express a fused protein by removing the stop codon for Np275 suggests Np275 and Np276 were recently part of a larger ancestral pentapeptide repeat protein.

Legend

Protein

Chemical

Disease

Primary Citation of related structures

Abstact

Feedback Form