PMID- 19752600 OWN - NLM STAT- MEDLINE DCOM- 20100121 LR - 20090915 IS - 1661-5433 (Electronic) IS - 1661-5425 (Linking) VI - 3 IP - 4 DP - 2009 TI - Copy number variation of testis-specific protein, Y-encoded (TSPY) in 14 different breeds of cattle (Bos taurus). PG - 205-13 LID - 10.1159/000228721 [doi] AB - Multi-copied gene families are prevalent in mammalian genomes, especially within the Y chromosome. Testis specific protein Y-encoded (TSPY) is present in variable copy number in many mammalian species. Previous studies have estimated that TSPY ranges from 50-200 copies in cattle. To examine TSPY localization on the Y chromosome we employed fluorescence in situ hybridization (FISH) and fiber-FISH. The results show a strong signal on the short arm of the Y chromosome (Yp). To investigate TSPY copy number we used relative real-time polymerase chain reaction (PCR) to analyze the DNA of 14 different cattle breeds. Variation both within and between breeds was observed. All breeds show significant variation in TSPY copy number among individual members. Brown Swiss (161 copies, CI = 133-195) had higher average levels of TSPY and Western Fjord Cattle (63 copies, CI = 45-86) had lower levels than some breeds. Overall, however, most breeds had a similar average TSPY copy number. The pooled average was 94 copies (CI = 88-100). The significance of the TSPY array remains uncertain, but as the function of TSPY is unraveled the purpose of the array may become clearer. CI - (c) 2009 S. Karger AG, Basel. FAU - Hamilton, C K AU - Hamilton CK AD - Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada. FAU - Favetta, L A AU - Favetta LA FAU - Di Meo, G P AU - Di Meo GP FAU - Floriot, S AU - Floriot S FAU - Perucatti, A AU - Perucatti A FAU - Peippo, J AU - Peippo J FAU - Kantanen, J AU - Kantanen J FAU - Eggen, A AU - Eggen A FAU - Iannuzzi, L AU - Iannuzzi L FAU - King, W A AU - King WA LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20090911 PL - Switzerland TA - Sex Dev JT - Sexual development : genetics, molecular biology, evolution, endocrinology, embryology, and pathology of sex determination and differentiation JID - 101316472 RN - 0 (Cell Cycle Proteins) SB - IM MH - Animals MH - *Breeding MH - Cattle/*genetics MH - Cell Cycle Proteins/*genetics/metabolism MH - DNA Copy Number Variations/*genetics MH - Gene Dosage/*genetics MH - Gene Expression Regulation MH - Genome/genetics MH - In Situ Hybridization, Fluorescence MH - Male MH - Organ Specificity MH - Reverse Transcriptase Polymerase Chain Reaction MH - Testis/*metabolism MH - Y Chromosome/*genetics EDAT- 2009/09/16 06:00 MHDA- 2010/01/22 06:00 CRDT- 2009/09/16 06:00 PHST- 2008/12/01 00:00 [received] PHST- 2009/02/05 00:00 [accepted] PHST- 2009/09/16 06:00 [entrez] PHST- 2009/09/16 06:00 [pubmed] PHST- 2010/01/22 06:00 [medline] AID - 000228721 [pii] AID - 10.1159/000228721 [doi] PST - ppublish SO - Sex Dev. 2009;3(4):205-13. doi: 10.1159/000228721. Epub 2009 Sep 11.