Proteopedia

5cqs

Dimerization of Elp1 is essential for Elongator complex assemblyDimerization of Elp1 is essential for Elongator complex assembly

Structural highlights

5cqs is a 4 chain structure with sequence from Saccharomyces cerevisiae S288C. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

ELP1_YEAST Acts as component of the RNA polymerase II elongator complex, which is a major histone acetyltransferase component of the RNA polymerase II (RNAPII) holoenzyme and is involved in transcriptional elongation. Association with elongating RNAPII requires a hyperphosphorylated state of the RNAPII C-terminal domain (CTD). Elongator binds to both naked and nucleosomal DNA, can acetylate both core and nucleosomal histones, and is involved in chromatin remodeling. It acetylates histones H3, preferentially at 'Lys-14', and H4, preferentially at 'Lys-8'. It functions as a gamma-toxin target (TOT); disruption of the complex confers resistance to Kluyveromyces lactis toxin zymocin (pGKL1 killer toxin). May also be involved in sensitiviy to Pichia inositovora toxin. May be involved in tRNA modification. Independently, ELP3 may be involved in polarized exocytosis. It is required for the polarized localization of GTPase-activating protein SEC2. Is required for an early step in synthesis of 5-methoxycarbonylmethyl (mcm5) and 5-carbamoylmethyl (ncm5) groups present on uridines at the wobble position in tRNA.[1] [2] [3] [4] [5] [6] [7] [8]

Publication Abstract from PubMed

The evolutionarily conserved Elongator complex, which is composed of six subunits elongator protein 1 (Elp1 to -6), plays vital roles in gene regulation. The molecular hallmark of familial dysautonomia (FD) is the splicing mutation of Elp1 [also known as IkappaB kinase complex-associated protein (IKAP)] in the nervous system that is believed to be the primary cause of the devastating symptoms of this disease. Here, we demonstrate that disease-related mutations in Elp1 affect Elongator assembly, and we have determined the structure of the C-terminal portion of human Elp1 (Elp1-CT), which is sufficient for full-length Elp1 dimerization, as well as the structure of the cognate dimerization domain of yeast Elp1 (yElp1-DD). Our study reveals that the formation of the Elp1 dimer contributes to its stability in vitro and in vivo and is required for the assembly of both the human and yeast Elongator complexes. Functional studies suggest that Elp1 dimerization is essential for yeast viability. Collectively, our results identify the evolutionarily conserved dimerization domain of Elp1 and suggest that the pathological mechanisms underlying the onset and progression of Elp1 mutation-related disease may result from impaired Elongator activities.

Dimerization of elongator protein 1 is essential for Elongator complex assembly.,Xu H, Lin Z, Li F, Diao W, Dong C, Zhou H, Xie X, Wang Z, Shen Y, Long J Proc Natl Acad Sci U S A. 2015 Aug 25;112(34):10697-702. doi:, 10.1073/pnas.1502597112. Epub 2015 Aug 10. PMID:26261306[9]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

  1. ↑ Otero G, Fellows J, Li Y, de Bizemont T, Dirac AM, Gustafsson CM, Erdjument-Bromage H, Tempst P, Svejstrup JQ. Elongator, a multisubunit component of a novel RNA polymerase II holoenzyme for transcriptional elongation. Mol Cell. 1999 Jan;3(1):109-18. PMID:10024884
  2. ↑ Frohloff F, Fichtner L, Jablonowski D, Breunig KD, Schaffrath R. Saccharomyces cerevisiae Elongator mutations confer resistance to the Kluyveromyces lactis zymocin. EMBO J. 2001 Apr 17;20(8):1993-2003. PMID:11296232 doi:10.1093/emboj/20.8.1993
  3. ↑ Krogan NJ, Greenblatt JF. Characterization of a six-subunit holo-elongator complex required for the regulated expression of a group of genes in Saccharomyces cerevisiae. Mol Cell Biol. 2001 Dec;21(23):8203-12. PMID:11689709 doi:10.1128/MCB.21.23.8203-8212.2001
  4. ↑ Winkler GS, Kristjuhan A, Erdjument-Bromage H, Tempst P, Svejstrup JQ. Elongator is a histone H3 and H4 acetyltransferase important for normal histone acetylation levels in vivo. Proc Natl Acad Sci U S A. 2002 Mar 19;99(6):3517-22. PMID:11904415 doi:10.1073/pnas.022042899
  5. ↑ Frohloff F, Jablonowski D, Fichtner L, Schaffrath R. Subunit communications crucial for the functional integrity of the yeast RNA polymerase II elongator (gamma-toxin target (TOT)) complex. J Biol Chem. 2003 Jan 10;278(2):956-61. Epub 2002 Nov 6. PMID:12424236 doi:http://dx.doi.org/10.1074/jbc.M210060200
  6. ↑ Klassen R, Meinhardt F. Structural and functional analysis of the killer element pPin1-3 from Pichia inositovora. Mol Genet Genomics. 2003 Nov;270(2):190-9. Epub 2003 Sep 9. PMID:13680368 doi:10.1007/s00438-003-0920-5
  7. ↑ Huang B, Johansson MJ, Bystrom AS. An early step in wobble uridine tRNA modification requires the Elongator complex. RNA. 2005 Apr;11(4):424-36. PMID:15769872 doi:11/4/424
  8. ↑ Rahl PB, Chen CZ, Collins RN. Elp1p, the yeast homolog of the FD disease syndrome protein, negatively regulates exocytosis independently of transcriptional elongation. Mol Cell. 2005 Mar 18;17(6):841-53. PMID:15780940 doi:http://dx.doi.org/S1097-2765(05)01117-2
  9. ↑ Xu H, Lin Z, Li F, Diao W, Dong C, Zhou H, Xie X, Wang Z, Shen Y, Long J. Dimerization of elongator protein 1 is essential for Elongator complex assembly. Proc Natl Acad Sci U S A. 2015 Aug 25;112(34):10697-702. doi:, 10.1073/pnas.1502597112. Epub 2015 Aug 10. PMID:26261306 doi:http://dx.doi.org/10.1073/pnas.1502597112

5cqs, resolution 2.70Å

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