HACL2

HACL2
Identifiers
AliasesILVBL, 209L8, AHAS, ILV2H, ilvB (bacterial acetolactate synthase)-like, HACL1L, ilvB acetolactate synthase like
External IDsOMIM: 605770; MGI: 1351911; GeneCards: ILVBL
Orthologs
DatabasesNCBI: entry; OMA: entry
SpeciesHumanMouse
Entrez

10994

216136

Ensembl

ENSG00000105135

ENSMUSG00000032763

UniProt

A1L0T0
E9PL44

Q8BU33

RefSeq (mRNA)

NM_006844
NM_176826

NM_173751
NM_001359301
NM_001359302
NM_001359303

RefSeq (protein)

NP_006835

NP_776112
NP_001346230
NP_001346231
NP_001346232

Location (UCSC)Chr 19: 15.11 – 15.13 MbChr 10: 78.41 – 78.42 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

2-hydroxyacyl-CoA lyase 2 is a protein that in humans is encoded by the HACL2 gene.[5] It was originally called ILVBL (ilvB-like) for its similarity to acetolactate synthase.[6]

Function

The protein product catalyzes the cleavage step of alpha oxidation in the endoplasmic reticulum. Specifically it is an enzyme that cleaves a 2-hydroxyhexadecanoyl (or hydroxyoctadecanoyl) CoA into coenzyme A and the corresponding aldehyde, heptadecanal or pentadecanal. It is involved in phytosphingosine degradation.[5]

There is no specific Enzyme Commission number for this activity as of 2026, being only vaguely categorizable as 4.1.2.-. It has a paralog in humans, HACL1 (gene), which performs a similar reaction in the peroxisome and is considered EC 4.1.2.62 (2-hydroxyacyl-CoA lyase).[5]

Structure

Gene

Human ILVBL gene has 17 exons resides on chromosome 19 at q13.1.[7]

Clinical significance

CADASIL, an identified autosomal dominant condition characterized by the recurrence of subcortical infarcts leading to dementia, was previously mapped to “ILVBL” gene within a 2-cM interval, D19S226–D19S199. This gene encodes a protein highly similar to the acetolactate synthase of other organisms. No recombination event was observed with D19S841, a highly polymorphic microsatellite marker isolated from a cosmid mapped to this region. No mutation was detected on this gene in CADASIL patients, suggesting that it is not implicated in this disorder.[6]

References

  1. 1 2 3 GRCh38: Ensembl release 89: ENSG00000105135 – Ensembl, May 2017
  2. 1 2 3 GRCm38: Ensembl release 89: ENSMUSG00000032763 – Ensembl, May 2017
  3. ↑ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ↑ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. 1 2 3 "UniProt A1L0T0". UniProt.
  6. 1 2 Joutel A, Ducros A, Alamowitch S, Cruaud C, Domenga V, Maréchal E, Vahedi K, Chabriat H, Bousser MG, Tournier-Lasserve E (December 1996). "A human homolog of bacterial acetolactate synthase genes maps within the CADASIL critical region". Genomics. 38 (2): 192–8. doi:10.1006/geno.1996.0615. PMID 8954801.
  7. ↑ "Entrez Gene:ILVBL ilvB (bacterial acetolactate synthase)-like".

Further reading