ELP3/YPL086C Summary Help

Standard Name ELP3 1
Systematic Name YPL086C
Alias HPA1 , TOT3 2 , KTI8 3
Feature Type ORF, Verified
Description Subunit of Elongator complex; Elongator is required for modification of wobble nucleosides in tRNA; exhibits histone acetyltransferase activity that is directed to histones H3 and H4; disruption confers resistance to K. lactis zymotoxin (1, 2, 4, 5, 6, 7 and see Summary Paragraph)
Name Description ELongator Protein
Gene Product Alias KAT9 8
Chromosomal Location
ChrXVI:386446 to 384773 | ORF Map | GBrowse
Note: this feature is encoded on the Crick strand.
Gene Ontology Annotations All ELP3 GO evidence and references
  View Computational GO annotations for ELP3
Molecular Function
Manually curated
Biological Process
Manually curated
Cellular Component
Manually curated
Regulators 2 genes
Classical genetics
Large-scale survey
558 total interaction(s) for 307 unique genes/features.
Physical Interactions
  • Affinity Capture-MS: 38
  • Affinity Capture-RNA: 3
  • Affinity Capture-Western: 26
  • Biochemical Activity: 1
  • Co-fractionation: 2
  • Co-localization: 1
  • Co-purification: 8
  • PCA: 2

Genetic Interactions
  • Dosage Rescue: 9
  • Negative Genetic: 248
  • Phenotypic Enhancement: 12
  • Phenotypic Suppression: 5
  • Positive Genetic: 54
  • Synthetic Growth Defect: 102
  • Synthetic Lethality: 38
  • Synthetic Rescue: 9

Expression Summary
Length (a.a.) 557
Molecular Weight (Da) 63,657
Isoelectric Point (pI) 9.65
Phosphorylation PhosphoGRID | PhosphoPep Database
sequence information
ChrXVI:386446 to 384773 | 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..1674 386446..384773 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 | E.C. | Entrez Gene | Entrez RefSeq Protein | MIPS | Search all NCBI (Entrez) | UniProtKB
Primary SGDIDS000006007

ELP3 encodes a histone acetyltransferase (HAT) that is part of the six-subunit Elongator complex, which is a major component of the RNA polymerase II holoenzyme responsible for transcriptional elongation (1, 2, 4). Elongator contains two discrete subcomplexes, one consisting of Iki3p/Elp1p, Elp2p, and Elp3p, and the other consisting of Elp4p, Iki1p/Elp5p, and Elp6p (9, 10). Elongator binds to both naked and nucleosomal DNA, can acetylate both core histones and nucleosomal substrates, and plays a role in chromatin remodeling (11, 5). 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 (5). Besides its role as a HAT, Elp3p assists subunit communication within Elongator by mediating the protein-protein interactions of Elp2p-Kti12p, Elp2p-Iki1p/Elp5p, Elp2p-Iki3p/Elp1p, and Kti12p-Iki1p/Elp5p (12).

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 (10). Cells lacking Elp3p experience hypoacetylation of histones H3 and H4 in chromatin (5, 13), whereas cells lacking both Gcn5p and Elp3p exhibit derepression of subtelomerically-located genes, suggesting a spread of Sir3p into subtelomeric DNA from the tip of the telomere (14). Disruption of ELP3 also confers resistance to the Kluyveromyces lactis zymotoxin (6), and a reduced sensitivity to the Pichia inositovora toxin (15).

Last updated: 2004-05-06 Contact SGD

References cited on this page View Complete Literature Guide for ELP3
1) 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
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.  (1994) Two Saccharomyces cerevisiae genes which control sensitivity to G1 arrest induced by Kluyveromyces lactis toxin. Mol Cell Biol 14(9):6306-16
4) 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
5) 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
6) 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
7) 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
8) Allis CD, et al.  (2007) New nomenclature for chromatin-modifying enzymes. Cell 131(4):633-6
9) Winkler GS, et al.  (2001) RNA polymerase II elongator holoenzyme is composed of two discrete subcomplexes. J Biol Chem 276(35):32743-9
10) 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
11) Wittschieben BO, et al.  (2000) Overlapping roles for the histone acetyltransferase activities of SAGA and elongator in vivo. EMBO J 19(12):3060-8
12) Fichtner L, et al.  (2002) Protein interactions within Saccharomyces cerevisiae Elongator, a complex essential for Kluyveromyces lactis zymocicity. Mol Microbiol 45(3):817-26
13) Kristjuhan A, et al.  (2002) Transcriptional inhibition of genes with severe histone h3 hypoacetylation in the coding region. Mol Cell 10(4):925-33
14) Kristjuhan A, et al.  (2003) Spreading of Sir3 protein in cells with severe histone H3 hypoacetylation. Proc Natl Acad Sci U S A 100(13):7551-6
15) 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