Abstract:
:A NotI linking library constructed from flow-sorted human chromosome 17 material was screened to aid in construction of a long-range restriction map of the Miller-Dieker chromosome region (MDCR) in 17p13.3. A total of 66 clones were mapped to one of eight regions of chromosome 17 using a somatic cell hybrid panel, and 44/66 (67%) of these clones cross-hybridized to rodent DNA on Southern blots. Of these, 24 clones were tested and all mapped to mouse chromosome 11, the homolog of human chromosome 17. Four linking clones mapped to 17p13.3 and were used for pulsed-field gel electrophoresis studies along with six other anonymous probes previously mapped to this region. Clone L132 was found to be deleted in all Miller-Dieker patients tested (n = 15) and therefore lies within the critical region for this disorder. It detects two NotI fragments (180 and 320 kb), one of which (320 kb) was shared by YNZ22 and YNH37, two probes previously shown to be co-deleted in all patients with the Miller-Dieker syndrome (MDS). These results indicate that all MDS patients share a minimum deletion region of greater than 370 kb. Two other NotI clones, L53 and L125, mapped telomeric to the MDS critical region and share a 600-kb MluI fragment with each other and with YNZ22/YNH37. This provides a 930-kb MluI map that encompasses the distal boundary of the MDS critical region but does not include the proximal boundary. A total of over 2 Mbp is represented in the MluI fragments by probes in subband p13.3, a cytogenetic region estimated to be 3-4 Mbp.
journal_name
Genomicsjournal_title
Genomicsauthors
Ledbetter SA,Wallace MR,Collins FS,Ledbetter DHdoi
10.1016/0888-7543(90)90549-asubject
Has Abstractpub_date
1990-06-01 00:00:00pages
264-9issue
2eissn
0888-7543issn
1089-8646journal_volume
7pub_type
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