5HZ7 image
Deposition Date 2016-02-02
Release Date 2016-05-18
Last Version Date 2024-11-20
Entry Detail
PDB ID:
5HZ7
Title:
High-resolution crystal structure of the minor DNA-binding pilin ComP from Neisseria meningitidis in fusion with MBP
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Resolution:
1.43 Å
R-Value Free:
0.19
R-Value Work:
0.15
R-Value Observed:
0.15
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:ComP
Chain IDs:A
Chain Length:490
Number of Molecules:1
Biological Source:Neisseria meningitidis
Peptide-like Molecules
PRD_900009
Primary Citation
A Comparative Structure/Function Analysis of Two Type IV Pilin DNA Receptors Defines a Novel Mode of DNA Binding.
Structure 24 926 934 (2016)
PMID: 27161979 DOI: 10.1016/j.str.2016.04.001

Abstact

DNA transformation is a widespread process allowing bacteria to capture free DNA by using filamentous nano-machines composed of type IV pilins. These proteins can act as DNA receptors as demonstrated by the finding that Neisseria meningitidis ComP minor pilin has intrinsic DNA-binding ability. ComP binds DNA better when it contains the DNA-uptake sequence (DUS) motif abundant in this species genome, playing a role in its trademark ability to selectively take up its own DNA. Here, we report high-resolution structures for meningococcal ComP and Neisseria subflava ComPsub, which recognize different DUS motifs. We show that they are structurally identical type IV pilins that pack readily into filament models and display a unique DD region delimited by two disulfide bonds. Functional analysis of ComPsub defines a new mode of DNA binding involving the DD region, adapted for exported DNA receptors.

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Primary Citation of related structures