What does it mean if you have the ACTN3 gene?
What is the ACTN3 Gene? The ACTN3 gene is specifically found in fast-twitch (type II) muscle fibers, which are in charge of producing forceful muscle contraction that are especially needed for sprinting and weight-lifting. The gene produces a protein that regulates the function of these fibers.
What race has the ACTN3 gene?
Table 1
| Population | Allele frequency of 577X | Allele frequency of 577R |
|---|---|---|
| Native American | 0.43 | 0.57 |
| Hispanic | 0.41 | 0.59 |
| European White | 0.42 | 0.58 |
| North Indian | 0.48 | 0.52 |
What trait does the ACTN3 gene code for?
for speed
ACTN3 is the famous ‘gene for speed’. It codes for a protein called alpha-actinin-3, which supports forceful, high-velocity contraction of fast-twitch muscle fibers.
What type of mutation is ACTN3?
nonsense mutation
The alpha actinin 3 (ACTN3) gene is 16,489 base pairs and consists of 22 exons and 21 introns. ACTN3 has a single nucleotide polymorphism (SNP) that confers a nonsense mutation (C >T transition at nucleotide 1747, R557X) in exon 16 (see star) resulting in a truncated protein.
What is the ACTN3 gene?
What is the ACTN3 gene? The ACTN3 gene encode actinin alpha-3, a protein found in fast-twitch muscles. Fast-twitch muscles are responsible for explosive burst of power or speed. A common genetic variant in the ACTN3 gene causes about 20% of the population to not produce fast-twitch muscle fiber.
Is ACTN3 genotype associated with muscle strength in women?
(2005a). ACTN3 genotype is associated with increases in muscle strength in response to resistance training in women. J. Appl. Physiol. 99, 154–163. 10.1152/japplphysiol.01139.2004 [PubMed] [CrossRef] [Google Scholar]
Is α-actinin-3 (ACTN3) gene polymorphism related to exercise performance?
A common null polymorphism (rs1815739; R577X) in the gene that codes for α-actinin-3 (ACTN3) has been related to different aspects of exercise performance.
Does loss of ACTN3 gene function alter muscle metabolism in humans?
Loss of ACTN3 gene function alters mouse muscle metabolism and shows evidence of positive selection in humans. Nat. Genet.39, 1261–1265. 10.1038/ng2122 [PubMed] [CrossRef] [Google Scholar]