HSD3B1 Gene

What is the HSD3B1 gene?

HSD3B1 encodes hydroxy-delta-5-steroid dehydrogenase 3 beta and steroid delta-isomerase 1, a protein involved in adrenal steroid synthesis. It belongs to the Hormonal category and is part of the Hormonal Regulation biological cluster. HSD3B1 encodes an enzyme essential for adrenal and gonadal steroid synthesis, converting pregnenolone to progesterone.

Biological role and pathway

HSD3B1 is involved in the adrenal steroid synthesis pathway, which plays a central role in regulating physiological processes relevant to immune defence, cellular energy, and systemic homeostasis. Genes within the Hormonal Regulation cluster work together to maintain balanced function across interconnected biological systems.

Variants in genes within this pathway may influence an individual's predisposition to altered function in these systems — particularly under conditions of physiological stress such as viral infection or prolonged illness.

Known genetic variants

The following variants (SNPs) in the HSD3B1 gene have been studied in relation to hormonal and chronic illness. Each variant represents a single nucleotide position where individuals may carry different alleles.

• rs1047303— HSD3B1 variant

Conditions studied in relation to HSD3B1

Research into HSD3B1 variants has explored associations with the following conditions. These are areas of scientific investigation and do not imply that HSD3B1 causes or treats any condition.

Genetic insights from DNA data

Consumer DNA files from 23andMe, AncestryDNA, and MyHeritage contain raw SNP data. When you upload your file to ChronicDNA, the analysis engine checks your genotype against a curated panel of 80+ genes selected for their relevance to Long COVID, ME/CFS, and connected biological pathways - some of which may include HSD3B1 and related genes in the hormonal regulation pathway.

The report is educational - it explains which variants you carry, what the research says about them, and how they fit into the biological pathways most relevant to chronic illness. Results are presented in plain English with appropriate scientific context, no medical jargon, no scare tactics. All results should be discussed with a qualified healthcare provider.

Related genes in the Hormonal Regulation pathway

HSD3B1 does not act in isolation. The following genes are functionally related and may be analysed together for a more complete picture of your genetic predispositions.

Frequently asked questions