rs1799992

This is a downstream gene variant variant in the HMBS gene.

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GWAS Catalog Trait Associations (3)

Genome-wide significant associations (p < 5×10⁻⁸) from the NHGRI-EBI GWAS Catalog.

body mass index

Harris BHL et al. “New role of fat-free mass in cancer risk linked with genetic predisposition.” Scientific Reports 14(1):7270 (2024)
Allele C
OR 0.02
p 3.0e-12
N 342,566
Large GWAS
European
Sakaue S et al. “A cross-population atlas of genetic associations for 220 human phenotypes.” Nature Genetics 53(10):1415-1424 (2021)
Allele C
OR 0.01
p 5.0e-11
N 523,818
Large GWAS
multi-ancestry

sphingomyelin measurement

Zoodsma M et al. “A genetic map of human metabolism across the allele frequency spectrum.” Nature Genetics 57(10):2445-2455 (2025)
Allele C
OR 0.01
p 2.0e-10
N 450,015
Large GWAS
multi-ancestry

serum alanine aminotransferase amount

Ghouse J et al. “Integrative common and rare variant analyses provide insights into the genetic architecture of liver cirrhosis.” Nature Genetics 56(5):827-837 (2024)
Allele C
OR 0.00
p 2.0e-8
N 1,010,710
Large GWAS
European

About HMBS

This gene encodes a member of the hydroxymethylbilane synthase superfamily. The encoded protein is the third enzyme of the heme biosynthetic pathway and catalyzes the head to tail condensation of four porphobilinogen molecules into the linear hydroxymethylbilane. Mutations in this gene are associated with the autosomal dominant disease acute intermittent porphyria. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Jul 2008]

View all HMBS variants →

Gene information from NCBI Gene. Variant classifications from ClinVar.

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