Liver X receptor beta

Protein-coding gene in the species Homo sapiens From Wikipedia, the free encyclopedia

Liver X receptor beta

Liver X receptor beta (LXR-β) is a member of the nuclear receptor family of transcription factors. LXR-β is encoded by the NR1H2 gene (nuclear receptor subfamily 1, group H, member 2).[5]

Quick Facts NR1H2, Available structures ...
NR1H2
Available structures
PDBOrtholog search: PDBe RCSB
Identifiers
AliasesNR1H2, LXR-b, LXRB, NER, NER-I, RIP15, UNR, Liver X receptor beta, nuclear receptor subfamily 1 group H member 2
External IDsOMIM: 600380; MGI: 1352463; HomoloGene: 21397; GeneCards: NR1H2; OMA:NR1H2 - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_007121
NM_001256647

NM_001285517
NM_001285518
NM_001285519
NM_009473

RefSeq (protein)

NP_001243576
NP_009052
NP_009052.3

NP_001272446
NP_001272447
NP_001272448
NP_033499

Location (UCSC)Chr 19: 50.33 – 50.38 MbChr 7: 44.2 – 44.2 Mb
PubMed search[3][4]
Wikidata
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Function

The liver X receptors (LXRs) were originally identified as orphan members of the nuclear receptor superfamily because their ligands were unknown. Like other receptors in the family, LXRs heterodimerize with retinoid X receptor and bind to specific response elements (LXREs) characterized by direct repeats separated by 4 nucleotides. Two genes, alpha (LXRA) and beta, are known to encode LXR proteins.[5][6]

Structure

Crystal structure of human liver X receptor β(LXRβ) forming heterodimer with its partner retinoid X receptor α(RXRα) on its cognate element, an AGGTCA direct repeat spaced by 4 nt shows an extended X-shaped arrangement, with DNA- and ligand-binding domains crossed. The LXRβ core binds DNA via canonical contacts and auxiliary DNA contacts that enhance affinity for the response element.[7]

Interactions

Liver X receptor beta has been shown to interact with NCOA6[8] and Retinoid X receptor alpha.[9]

References

Further reading

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