rs13266634 is a SNP in the zinc transporter protein member 8 SLC30A8 gene that has primarily been associated with type-2 diabetes in several studies.
This SNP is also known as the Arg325Trp or R325W variant; the (C) allele encodes the arginine (R), and the (T) allele encodes the Tryptophan (W).
The major alleles of the SLC30A8 SNP rs13266634 and the HHEX SNP rs7923837 associate with reduced insulin secretion, but not with insulin resistance.
46% of European non-diabetic offspring of type-2 diabetes patients are rs13266634(C;C) homozygotes; they are diabetes-prone and characterised by a 19% decrease in first-phase insulin release following an intravenous glucose load.
Magnitude: 2.5
Frequency: 38.9%