Abstract:
:Two single point mutations in the alpha-1-antitrypsin gene, resulting in AAT deficiency, have been characterised in heterozygotes by DNA amplification and direct sequencing. The mutations result in amino acid substitutions, Gly115----Ser and Ser-19----Leu, in the leader sequence, respectively, and have been designated Pi Null(Newport) and Pi Z Wrexham. In the two families studied the mutations occur on chromosomes which also carry the common mutation causing Z deficiency. Individuals with such a deficiency are, therefore, compound heterozygotes. It is not known if these particular mutations would only cause a mild form of AAT deficiency in the absence of the Z mutation as they do not appear to cause predictable folding abnormalities. They do, however, result in severe deficiency when the Z mutation occurs in the same gene.
journal_name
Hum Genetjournal_title
Human geneticsauthors
Graham A,Kalsheker NA,Bamforth FJ,Newton CR,Markham AFdoi
10.1007/BF00194233subject
Has Abstractpub_date
1990-10-01 00:00:00pages
537-40issue
5eissn
0340-6717issn
1432-1203journal_volume
85pub_type
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