Structural highlights
3v62 is a 6 chain structure with sequence from Baker's yeast. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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| Ligands: | , |
| NonStd Res: | |
| Related: | 3v60, 3v61 |
| Gene: | D9719.15, SMT3, YDR510W (Baker's yeast), POL30, YBR0811, YBR088C (Baker's yeast), HPR5, J0913, RADH, SRS2, YJL092W (Baker's yeast) |
| Activity: | DNA helicase, with EC number 3.6.4.12 |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
[SMT3_YEAST] Not known; suppressor of MIF2 mutations. [SRS2_YEAST] ATP-dependent DNA helicase involved in DNA repair at least for UV-induced lesions. The polarity of the helicase activity was determined to be 3' to 5'. [PCNA_YEAST] This protein is an auxiliary protein of DNA polymerase delta and is involved in the control of eukaryotic DNA replication by increasing the polymerase's processibility during elongation of the leading strand. Involved in DNA repair.[1] [2]
Publication Abstract from PubMed
Ubiquitin (Ub) and ubiquitin-like (Ubl) modifiers such as SUMO (also known as Smt3 in Saccharomyces cerevisiae) mediate signal transduction through post-translational modification of substrate proteins in pathways that control differentiation, apoptosis and the cell cycle, and responses to stress such as the DNA damage response. In yeast, the proliferating cell nuclear antigen PCNA (also known as Pol30) is modified by ubiquitin in response to DNA damage and by SUMO during S phase. Whereas Ub-PCNA can signal for recruitment of translesion DNA polymerases, SUMO-PCNA signals for recruitment of the anti-recombinogenic DNA helicase Srs2. It remains unclear how receptors such as Srs2 specifically recognize substrates after conjugation to Ub and Ubls. Here we show, through structural, biochemical and functional studies, that the Srs2 carboxy-terminal domain harbours tandem receptor motifs that interact independently with PCNA and SUMO and that both motifs are required to recognize SUMO-PCNA specifically. The mechanism presented is pertinent to understanding how other receptors specifically recognize Ub- and Ubl-modified substrates to facilitate signal transduction.
Recognition of SUMO-modified PCNA requires tandem receptor motifs in Srs2.,Armstrong AA, Mohideen F, Lima CD Nature. 2012 Feb 29;483(7387):59-63. doi: 10.1038/nature10883. PMID:22382979[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Haracska L, Kondratick CM, Unk I, Prakash S, Prakash L. Interaction with PCNA is essential for yeast DNA polymerase eta function. Mol Cell. 2001 Aug;8(2):407-15. PMID:11545742
- ↑ Hoege C, Pfander B, Moldovan GL, Pyrowolakis G, Jentsch S. RAD6-dependent DNA repair is linked to modification of PCNA by ubiquitin and SUMO. Nature. 2002 Sep 12;419(6903):135-41. PMID:12226657 doi:10.1038/nature00991
- ↑ Armstrong AA, Mohideen F, Lima CD. Recognition of SUMO-modified PCNA requires tandem receptor motifs in Srs2. Nature. 2012 Feb 29;483(7387):59-63. doi: 10.1038/nature10883. PMID:22382979 doi:10.1038/nature10883
