Linked Life Data

9027490

Source:http://linkedlifedata.com/resource/pubmed/id/9027490

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1997-3-31
pubmed:databankReference
pubmed:abstractText
The locus control region (LCR) of mammalian beta-globin genes covers at least 17 kb at the 5' end of the gene cluster and has been implicated in chromatin domain opening, enhancement, and insulation from neighboring sequences. Functional dissection of the LCR has defined the minimal cores for four of the five major DNase hypersensitive sites (HSs) that mark this regulatory region. To examine fully the patterns of conserved sequences in the mammalian homologs to the beta-globin LCR, we determined the complete DNA sequence of the galago beta-globin LCR and completed previously unsequenced regions of the rabbit LCR. Simultaneous alignment of these sequences with the human, goat, and mouse LCRs revealed conserved sequences (phylogenetic footprints) detected using three largely independent methods. The most highly conserved segments are found both within the HS cores and in some but not all regions flanking the cores. These results argue for an extended pattern of well-conserved sequences, many of which lie outside the minimal cores, and we show that a key sequence required for domain opening by the region including HS3 maps about 1 kb 5' to the minimal core. Differential phylogenetic footprints, containing sequences conserved in nonhuman mammals but not in humans, are found primarily around HS3, consistent with some species-specific differences in function that may be important for differences in hemoglobin switching during development.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0888-7543
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
39
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
90-4
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
The complete sequences of the galago and rabbit beta-globin locus control regions: extended sequence and functional conservation outside the cores of DNase hypersensitive sites.
pubmed:affiliation
Molecular Biology Unit 7242, Pharmacia & Upjohn, Inc., Kalamazoo, Michigan 49007, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.