title: Evidence for evolutionary conservation of a physical linkage between the human BAF60b, a subunit of SWI/SNF complex, and thyroid hormone receptor interacting protein-1 genes on chromosome 17.
abstract: The ubiquitously expressed rat BAF60b gene, which codes for a subunit of the multiprotein SWI/SNF complex, was recently identified between the pituitary growth hormone (GH-N) and thyroid hormone receptor interacting protein-1 (TRIP-1) genes. In primates, duplication of the GH-N gene has resulted in the addition of four placenta-specific (GH-V, CS-A, CS-B, and CS-L) genes downstream of the GH-N gene. As part of our study of the effect of remote sequences on the transcriptional regulation of the GH/CS gene family, we showed recently that these genes lie 40 kb upstream of the human TRIP-1 gene. We have now investigated the presence of the human BAF60b gene upstream of the TRIP-1 gene for evidence of evolutionary conservation of this arrangement or its disruption by the recent duplication of the nearby GH-N gene in primates. We report that, as in the rat genome, the human BAF60b gene is in the reverse transcriptional direction relative to the TRIP-1 gene, such that their polyadenylation sites are separated by 93 bp which compares with 92 bp in the rat. Reexamination of reported porcine TRIP-1 sequences also revealed the presence of the BAF60b gene separated by 93 bp, supporting an evolutionary conservation of this arrangement.
authors.affiliation: Department of Physiology, University of Manitoba, Winnipeg, Canada.
authors.forename: R M
authors.initials: RM
authors.lastname: Surabhi
authors.forename: L D
authors.initials: LD
authors.lastname: Daly
authors.forename: P A
authors.initials: PA
authors.lastname: Cattini
mesh_terms: D000074183:ATPases Associated with Diverse Cellular Activities; D048868:Adaptor Proteins, Signal Transducing; D000818:Animals; D001483:Base Sequence; D002868:Chromosomal Proteins, Non-Histone; D002874:Chromosome Mapping; D002886:Chromosomes, Human, Pair 17; D017124:Conserved Sequence; D019143:Evolution, Molecular; D005260:Female; D005786:Gene Expression Regulation; D018398:Homeodomain Proteins / Q000235:genetics; D006801:Humans; D060588:LIM Domain Proteins; D008969:Molecular Sequence Data; D005810:Multigene Family; D010920:Placenta / Q000378:metabolism; D011247:Pregnancy; D046988:Proteasome Endopeptidase Complex; D051381:Rats; D016415:Sequence Alignment; D012689:Sequence Homology, Nucleic Acid; D013552:Swine; D014157:Transcription Factors / Q000235:genetics*; D014158:Transcription, Genetic
chemical_list: D048868:Adaptor Proteins, Signal Transducing; D002868:Chromosomal Proteins, Non-Histone; D018398:Homeodomain Proteins; D060588:LIM Domain Proteins; C092282:PSMC5 protein, human; C491651:SMARCD2 protein, human; C491650:Smarcd2 protein, rat; D014157:Transcription Factors; D046988:Proteasome Endopeptidase Complex; D000074183:ATPases Associated with Diverse Cellular Activities