ELP2/YGR200C Summary Help

Standard Name ELP2 1
Systematic Name YGR200C
Alias TOT2 2 , KTI3 3
Feature Type ORF, Verified
Description Subunit of Elongator complex; Elongator is required for modification of wobble nucleosides in tRNA; target of Kluyveromyces lactis zymocin (4, 5, 6 and see Summary Paragraph)
Name Description ELongator Protein 1
Chromosomal Location
ChrVII:902270 to 899904 | ORF Map | GBrowse
Note: this feature is encoded on the Crick strand.
Gene Ontology Annotations All ELP2 GO evidence and references
  View Computational GO annotations for ELP2
Molecular Function
Manually curated
Biological Process
Manually curated
Cellular Component
Manually curated
Regulators 4 genes
Classical genetics
Large-scale survey
536 total interaction(s) for 287 unique genes/features.
Physical Interactions
  • Affinity Capture-MS: 41
  • Affinity Capture-Western: 34
  • Co-purification: 18
  • PCA: 4
  • Protein-peptide: 2
  • Reconstituted Complex: 10

Genetic Interactions
  • Dosage Rescue: 8
  • Negative Genetic: 273
  • Phenotypic Enhancement: 2
  • Phenotypic Suppression: 1
  • Positive Genetic: 62
  • Synthetic Growth Defect: 47
  • Synthetic Lethality: 28
  • Synthetic Rescue: 6

Expression Summary
Length (a.a.) 788
Molecular Weight (Da) 89,410
Isoelectric Point (pI) 5.34
Phosphorylation PhosphoGRID | PhosphoPep Database
sequence information
ChrVII:902270 to 899904 | ORF Map | GBrowse
Note: this feature is encoded on the Crick strand.
Last Update Coordinates: 2011-02-03 | Sequence: 1996-07-31
Subfeature details
Most Recent Updates
Coordinates Sequence
CDS 1..2367 902270..899904 2011-02-03 1996-07-31
Retrieve sequences
Analyze Sequence
S288C only
S288C vs. other species
S288C vs. other strains
External Links All Associated Seq | Entrez Gene | Entrez RefSeq Protein | MIPS | Search all NCBI (Entrez) | UniProtKB
Primary SGDIDS000003432

Elp2p is part of the six-subunit Elongator complex, which is a major histone acetyltransferase component of the RNA polymerase II holoenzyme responsible for transcriptional elongation (7, 2, 8). Elongator contains two discrete subcomplexes, one consisting of Iki3p/Elp1p, Elp2p, and Elp3p, and the other consisting of Elp4p, Iki1p/Elp5p, and Elp6p (4, 9). Elongator binds to both naked and nucleosomal DNA, can acetylate both core histones and nucleosomal substrates, and plays a role in chromatin remodeling (10, 11). Its activity is directed specifically toward the amino-terminal tails of histone H3 and H4, with the predominant acetylation sites being lysine-14 of histone H3 and lysine-8 of histone H4 (11). Within Elongator, Elp2p interacts specifically with Iki1p/Elp5p, Iki3p/Elp1p, and Kti12p (5).

Of the six Elongator subunits, only Iki1p/Elp5p is essential for growth, and deletion of the other individual subunits causes significantly altered mRNA expression levels for many genes (9). Disruption of the Elongator complex confers resistance to the Kluyveromyces lactis zymotoxin (12), and a reduced sensitivity to the Pichia inositovora toxin (13).

Last updated: 2004-05-11 Contact SGD

References cited on this page View Complete Literature Guide for ELP2
1) Fellows J, et al.  (2000) The Elp2 subunit of elongator and elongating RNA polymerase II holoenzyme is a WD40 repeat protein. J Biol Chem 275(17):12896-9
2) Frohloff F, et al.  (2001) Saccharomyces cerevisiae Elongator mutations confer resistance to the Kluyveromyces lactis zymocin. EMBO J 20(8):1993-2003
3) Butler AR, et al.  (1991) Intracellular expression of Kluyveromyces lactis toxin gamma subunit mimics treatment with exogenous toxin and distinguishes two classes of toxin-resistant mutant. Yeast 7(6):617-25
4) Winkler GS, et al.  (2001) RNA polymerase II elongator holoenzyme is composed of two discrete subcomplexes. J Biol Chem 276(35):32743-9
5) Fichtner L, et al.  (2002) Protein interactions within Saccharomyces cerevisiae Elongator, a complex essential for Kluyveromyces lactis zymocicity. Mol Microbiol 45(3):817-26
6) Esberg A, et al.  (2006) Elevated levels of two tRNA species bypass the requirement for elongator complex in transcription and exocytosis. Mol Cell 24(1):139-48
7) Wittschieben BO, et al.  (1999) A novel histone acetyltransferase is an integral subunit of elongating RNA polymerase II holoenzyme. Mol Cell 4(1):123-8
8) Jablonowski D, et al.  (2001) Kluyveromyces lactis zymocin mode of action is linked to RNA polymerase II function via Elongator. Mol Microbiol 42(4):1095-105
9) Krogan NJ and Greenblatt JF  (2001) Characterization of a six-subunit holo-elongator complex required for the regulated expression of a group of genes in Saccharomyces cerevisiae. Mol Cell Biol 21(23):8203-12
10) Wittschieben BO, et al.  (2000) Overlapping roles for the histone acetyltransferase activities of SAGA and elongator in vivo. EMBO J 19(12):3060-8
11) Winkler GS, et al.  (2002) Elongator is a histone H3 and H4 acetyltransferase important for normal histone acetylation levels in vivo. Proc Natl Acad Sci U S A 99(6):3517-22
12) Frohloff F, et al.  (2003) Subunit communications crucial for the functional integrity of the yeast RNA polymerase II elongator (gamma-toxin target (TOT)) complex. J Biol Chem 278(2):956-61
13) Klassen R and Meinhardt F  (2003) Structural and functional analysis of the killer element pPin1-3 from Pichia inositovora. Mol Genet Genomics 270(2):190-9