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AliasesELAC2, COXPD17, ELC2, HPC2, elaC ribonuclease Z 2
External IDsMGI: 1890496 HomoloGene: 6403 GeneCards: ELAC2
Gene location (Human)
Chromosome 17 (human)
Chr.Chromosome 17 (human)[1]
Chromosome 17 (human)
Genomic location for ELAC2
Genomic location for ELAC2
Band17p12Start12,992,391 bp[1]
End13,018,187 bp[1]
RNA expression pattern
PBB GE ELAC2 201767 s at fs.png
More reference expression data
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC)Chr 17: 12.99 – 13.02 MbChr 11: 64.98 – 65 Mb
PubMed search[3][4]
View/Edit HumanView/Edit Mouse

Zinc phosphodiesterase ELAC protein 2 is an enzyme that in humans is encoded by the ELAC2 gene.[5][6][7] on chromosome 17. It is an endonuclease thought to be involved in mitochondrial tRNA maturation,


The ELAC2 gene encodes a protein that is 92 kDa in size and is localized to the mitochondrion [8] and the nucleus. The ELAC2 protein is a zinc phosphodiesterase, which is known to show tRNA 3'-processing endonuclease activity inside the mitochondria. Mitochondria contain their own pool of tRNAs that are involved in the protein translation of 13 subunits of the respiratory chain that are encoded by the mitochondrial genome. ELAC2 functions in the maturation of tRNA by removing a 3'-trailer (extra 3' nucleotides) from tRNA precursors, generating 3' termini of tRNAs.

The reaction leaves a 3'-hydroxy group is left at the tRNA end, and a 5'-phosphoryl group at the cleaved, trailing end. The reaction requires zinc ions as co-factors.

Clinical significance[edit]

Variants of the ELAC2 gene are associated with prostate cancer, hereditary 2 (HPC2), a condition associated with familial cancer of the prostate.[9][10] Multiple mutations including truncation and missense mutations are known to cause the disease from multiple families based on linkage analysis and positional cloning.[10]

In addition, mutations in ELAC2 are known to cause combined oxidative phosphorylation deficiency 17 (COXPD17), a rare autosomal recessive disorder of mitochondrial functions characterized by severe hypertrophic cardiomyopathy.[11]


  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000006744 - Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000020549 - Ensembl, May 2017
  3. ^ "Human PubMed Reference:".
  4. ^ "Mouse PubMed Reference:".
  5. ^ Rebbeck TR, Walker AH, Zeigler-Johnson C, Weisburg S, Martin AM, Nathanson KL, Wein AJ, Malkowicz SB (Oct 2000). "Association of HPC2/ELAC2 Genotypes and Prostate Cancer". Am J Hum Genet. 67 (4): 1014–9. doi:10.1086/303096. PMC 1287872. PMID 10986046.
  6. ^ Noda D, Itoh S, Watanabe Y, Inamitsu M, Dennler S, Itoh F, Koike S, Danielpour D, ten Dijke P, Kato M (September 2006). "ELAC2, a putative prostate cancer susceptibility gene product, potentiates TGF-beta/Smad-induced growth arrest of prostate cells". Oncogene. 25 (41): 5591–600. doi:10.1038/sj.onc.1209571. PMID 16636667.
  7. ^ "Entrez Gene: ELAC2 elaC homolog 2 (E. coli)".
  8. ^ Brzezniak LK, Bijata M, Szczesny RJ, Stepien PP (2011). "Involvement of human ELAC2 gene product in 3' end processing of mitochondrial tRNAs". RNA Biol. 8 (4): 616–26. doi:10.4161/rna.8.4.15393. PMID 21593607.
  9. ^ Wang L, McDonnell SK, Elkins DA, Slager SL, Christensen E, Marks AF, Cunningham JM, Peterson BJ, Jacobsen SJ, Cerhan JR, Blute ML, Schaid DJ, Thibodeau SN (2001). "Role of HPC2/ELAC2 in hereditary prostate cancer". Cancer Res. 61 (17): 6494–9. PMID 11522646.
  10. ^ a b Rökman A, Ikonen T, Mononen N, Autio V, Matikainen MP, Koivisto PA, Tammela TL, Kallioniemi OP, Schleutker J (2001). "ELAC2/HPC2 involvement in hereditary and sporadic prostate cancer". Cancer Res. 61 (16): 6038–41. PMID 11507049.
  11. ^ Haack TB, Kopajtich R, Freisinger P, Wieland T, Rorbach J, Nicholls TJ, Baruffini E, Walther A, Danhauser K, Zimmermann FA, Husain RA, Schum J, Mundy H, Ferrero I, Strom TM, Meitinger T, Taylor RW, Minczuk M, Mayr JA, Prokisch H (2013). "ELAC2 mutations cause a mitochondrial RNA processing defect associated with hypertrophic cardiomyopathy". Am. J. Hum. Genet. 93 (2): 211–23. doi:10.1016/j.ajhg.2013.06.006. PMC 3738821. PMID 23849775.

Further reading[edit]