5zyp

Structural highlights

Function

[CTR9_YEAST] The PAF1 complex is a multifunctional complex. Involved in transcription initiation via genetic interactions with TATA-binding proteins. Involved in elongation. It regulates 3'-end formation of snR47 by modulating the recruitment or stable association of NRD1 and NAB3 with RNA polymerase II. Also has a role in transcription-coupled histone modification. Required for activation of RAD6 ubiquitin conjugate and the BRE1 ubiquitin ligase which ubiquitinate 'Lys-126' histone H2B. Activates the SET1 histone methyltransferase complex for methylation of 'Lys-4' of histone H3 and for methylation of 'Lys-73' of histone H3 by DOT1 and 'Lys-36' of histone H3 by SET2. In complex with PAF1, required for normal CLN1 and CLN2 G1 cyclin expression in late G1. Also has a role in chromosome segregation where it appears to be involved in microtubule placement.^{[1] [2] [3] [4]}

References

1. ↑ Koch C, Wollmann P, Dahl M, Lottspeich F. A role for Ctr9p and Paf1p in the regulation G1 cyclin expression in yeast. Nucleic Acids Res. 1999 May 15;27(10):2126-34. PMID:10219085
2. ↑ Porter SE, Penheiter KL, Jaehning JA. Separation of the Saccharomyces cerevisiae Paf1 complex from RNA polymerase II results in changes in its subnuclear localization. Eukaryot Cell. 2005 Jan;4(1):209-20. PMID:15643076 doi:http://dx.doi.org/10.1128/EC.4.1.209-220.2005
3. ↑ Sheldon KE, Mauger DM, Arndt KM. A Requirement for the Saccharomyces cerevisiae Paf1 complex in snoRNA 3' end formation. Mol Cell. 2005 Oct 28;20(2):225-36. PMID:16246725 doi:S1097-2765(05)01568-6
4. ↑ Foreman PK, Davis RW. CDP1, a novel Saccharomyces cerevisiae gene required for proper nuclear division and chromosome segregation. Genetics. 1996 Dec;144(4):1387-97. PMID:8978028