SRY
From Wikipedia, the free encyclopedia
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sex determining region Y
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| Identifiers | |
| Symbol | SRY |
| HUGO | 11311 |
| Entrez | 6736 |
| OMIM | 480000 |
| RefSeq | NM_003140 |
| UniProt | Q05066 |
| Other data | |
| Locus | Chr. Y p11.3 |
SRY (Sex-determining Region Y) is a sex-determining gene on the Y chromosome in humans and other primates. It is not the only, or even most common sex-determining gene in mammals. Most non-primate mammals use the Y chromosome gene UBE1 for the same purpose.
The SRY gene encodes the testis determining factor, which is also referred to as the SRY protein.
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[edit] Impact upon gender
Since its discovery, the importance of the SRY gene in sex determination has been extensively documented:
- Humans with one Y chromosome and multiple X chromosomes (XXY, XXXY etc.) are usually males.
- Individuals with a male phenotype and an XX (female) genotype have been observed; these males have the SRY gene in one or both X chromosomes, moved there by chromosomal translocation. (However, these males are infertile.)
- Similarly, there are females with an XXY genotype. These females have no SRY gene in their Y chromosome.
- Mice with a XX genotype but with an SRY gene on one of their X chromosomes have been engineered; these mice are phenotypically male.
[edit] SRY and the Olympics
One of the most controversial uses of this discovery was as a means for gender verification at the Olympic Games, under a system implemented by the International Olympic Committee in 1992. Athletes with a SRY gene were not permitted to participate as females, although all athletes in whom this was "detected" at the 1996 Summer Olympics were ruled false positives and were not disqualified. In the late 1990s, a number of relevant professional societies in United States called for elimination of gender verification, including the American Medical Association, the American Academy of Pediatrics, the American College of Physicians, the American College of Obstetricians and Gynecologists, the Endocrine Society and the American Society of Human Genetics, stating that the method used was uncertain and ineffective (Facius 2004). The screening was eliminated as of the 2000 Summer Olympics.[1][2][3]
[edit] SRY-related diseases and defects
Individuals with XY genotype and functional SRY gene can have a female phenotype, where the underlying cause is androgen insensitivity syndrome (AIS).
SRY has been linked to the fact that men are more likely than women to develop dopamine-related diseases such as schizophrenia and Parkinson's disease. SRY makes a protein that controls concentrations of dopamine, the neurotransmitter that carries signals from the brain that control movement and coordination.[4][5]
[edit] See also
[edit] References
- ^ Facius, Georg M. (August 2004). The Major Medical Blunder of the 20th Century. Bodies Like Ours. Retrieved on May 30, 2006.
- ^ Elsas, LJ; Ljungqvist A, Ferguson-Smith MA, Simpson JL, Genel M, Carlson AS, Ferris E, de la Chapelle A, Ehrhardt AA (July-August 2000). "Gender verification of female athletes". Genetics in Medicine 2 (4): 249-54. PMID 11252710. Retrieved on 2006-05-30.
- ^ Dickinson, BD; Genel M, Robinowitz CB, Turner PL, Woods GL (October 2002). "Gender verification of female Olympic athletes". Medicine & Science in Sports & Exercise 34 (10): 1543. PMID 12370551. Retrieved on 2006-05-30.
- ^ Dewing, P; Chiang CW, Sinchak K, Sim H, Fernagut PO, Kelly S, Chesselet MF, Micevych PE, Albrecht KH, Harley VR, Vilain E (Feb 21 2006). "Direct regulation of adult brain function by the male-specific factor SRY". Current Biology 16 (4): 415-20. PMID 16488877. Retrieved on 2006-05-30.
- ^ Haaxma, C., et al. (Feb. 22-26, 2006). "Gender differences in Parkinson's disease". 1st World Parkinson Congress.
