NDLI: A revision of the human XIST gene organization and structural comparison with mouse Xist

Content Provider	Springer Nature Link
Author	Hong, Young Kwon Ontiveros, Sara D. Strauss, William M.
Copyright Year	2000
Abstract	The XIST gene plays an essential role in X Chromosome (Chr) inactivation during the early development of female humans. It is believed that the XIST gene, not encoding a protein, functions as an RNA. The XIST cDNA is unusually long, as its full length is reported to be 16.5 kilobase pairs (kb). Here, comparison of sequences from the genomic interval downstream to the 3′ end of the human XIST gene against the human EST database brought to light a number of human EST sequences that are mapped to the region. Furthermore, PCR amplification of human cDNA libraries and RNA fluorescence in situ hybridization (RNA-FISH) demonstrate that the human XIST gene has additional 2.8 kb downstream sequences which have not been documented as a part of the gene. These data show that the full-length XIST cDNA is, in fact, 19.3 kb, not 16.5 kb as previously reported. The newly defined region contains an intron that may be alternatively spliced and seven polyadenylation signal sequences. Sequences in the newly defined region show overall sequence similarity with the 3′ terminal region of mouse Xist, and three subregions exhibit quite high sequence conservation. Interestingly, the new intron spans the first two subregions that are absent in one of the two isoforms of mouse Xist. Taken together, we revise the structure of human XIST cDNA and compare cDNA structures between human and mouse XIST/Xist.
Starting Page	220
Ending Page	224
Page Count	5
File Format	PDF
ISSN	09388990
Journal	Mammalian Genome
Volume Number	11
Issue Number	3
e-ISSN	14321777
Language	English
Publisher	Springer-Verlag
Publisher Date	2014-02-26
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cell Biology Anatomy Zoology
Content Type	Text
Resource Type	Article
Subject	Genetics

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