1l2m image
Deposition Date 2002-02-22
Release Date 2002-09-18
Last Version Date 2024-05-22
Entry Detail
PDB ID:
1L2M
Keywords:
Title:
Minimized Average Structure of the N-terminal, DNA-binding domain of the replication initiation protein from a geminivirus (Tomato yellow leaf curl virus-Sardinia)
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Conformers Submitted:
1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Rep protein
Gene (Uniprot):C1
Chain IDs:A
Chain Length:118
Number of Molecules:1
Biological Source:Tomato yellow leaf curl Sardinia virus
Ligand Molecules
Primary Citation
The structure of a replication initiator unites diverse aspects of nucleic acid metabolism
Proc.Natl.Acad.Sci.USA 99 10310 10315 (2002)
PMID: 12130667 DOI: 10.1073/pnas.152342699

Abstact

Rolling circle replication is a mechanism for copying single-stranded genomes by means of double-stranded intermediates. A multifunctional replication initiator protein (Rep) is indispensable for the precise initiation and termination of this process. Despite the ubiquitous presence and fundamental importance of rolling circle replication elements, structural information on their respective replication initiators is still missing. Here we present the solution NMR structure of the catalytic domain of Rep, the initiator protein of tomato yellow leaf curl virus. It is composed of a central five-stranded anti-parallel beta-sheet, flanked by a small two-stranded beta-sheet, a beta-hairpin and two alpha-helices. Surprisingly, the structure reveals that the catalytic Rep domain is related to a large group of proteins that bind RNA or DNA. Identification of Rep as resembling the family of ribonucleoprotein/RNA-recognition motif fold proteins establishes a structure-based evolutionary link between RNA binding proteins, splicing factors, and replication initiators of prokaryotic and eukaryotic single-stranded DNA elements and mammalian DNA tumor viruses.

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Primary Citation of related structures