ISDA

Deposition Date 2012-11-02

Release Date 2013-04-03

Last Version Date 2024-05-08

Entry Detail

PDB ID:

2YPW

Keywords:

MEMBRANE PROTEIN

Title:

Atomic model for the N-terminus of TraO fitted in the full-length structure of the bacterial pKM101 type IV secretion system core complex

Biological Source:

Source Organism:

ESCHERICHIA COLI (Taxon ID: 562)

Host Organism:

ESCHERICHIA COLI

Method Details:

Experimental Method:

ELECTRON MICROSCOPY

Resolution:

12.40 Å

Aggregation State:

PARTICLE

Reconstruction Method:

SINGLE PARTICLE

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:TRAO
Gene (Uniprot):traO
Chain IDs:A, B, C, D, E, F, G, H, I, J, K, L, M, N
Chain Length:112
Number of Molecules:14
Biological Source:ESCHERICHIA COLI

UniProt ID:Q46704 Pfam ID:PF03524

Ligand Molecules

Primary Citation

Structure of a Bacterial Type Iv Secretion Core Complex at Subnanometre Resolution.

Rivera-Calzada, A, Fronzes, R, Savva, C.G, Chandran, V, Lian, P.W, Laeremans, T, Pardon, E, Steyaert, J, Remaut, H, Waksman, G, Orlova, E.V, Fronzes, R, Schafer, E, Wang, L, Saibil, H.R, Orlova, E.V, Waksman, G.Show

Embo J. 32 1195 ? (2013)

PMID: 23511972 DOI: 10.1038/EMBOJ.2013.58

Abstact

Type IV secretion (T4S) systems are able to transport DNAs and/or proteins through the membranes of bacteria. They form large multiprotein complexes consisting of 12 proteins termed VirB1-11 and VirD4. VirB7, 9 and 10 assemble into a 1.07 MegaDalton membrane-spanning core complex (CC), around which all other components assemble. This complex is made of two parts, the O-layer inserted in the outer membrane and the I-layer inserted in the inner membrane. While the structure of the O-layer has been solved by X-ray crystallography, there is no detailed structural information on the I-layer. Using high-resolution cryo-electron microscopy and molecular modelling combined with biochemical approaches, we determined the I-layer structure and located its various components in the electron density. Our results provide new structural insights on the CC, from which the essential features of T4S system mechanisms can be derived.

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Primary Citation of related structures