A new alpha chain variant Hb Sallanches [alpha 2 104(G11) Cys-->Tyr] associated with HbH disease in one homozygous patient. 1995

F Morlé, and A Francina, and R Ducrocq, and H Wajcman, and C Gonnet, and N Philippe, and G Souillet, and J Godet
Centre de Génétique Moléculaire et Cellulaire, CNRS UMR 106, Villeurbanne, France.

We identified a new alpha-chain variant (alpha Sal) associated with haemolytic anaemia and low level of HbH in one homozygous patient. This new mutation is located in codon 104 (TGC-->TAC) of the alpha 2 globin gene and results in a Cys-->Tyr replacement. In vitro and in vivo biosynthetic studies suggest that the mechanism leading to HbH disease in this homozygous patient is mostly related to a significant instability of alpha Sal:beta dimers rather than to the hyperinstability of the alpha Sal chain itself only.

UI MeSH Term Description Entries
D008297 Male Males
D008969 Molecular Sequence Data Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories. Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D002675 Child, Preschool A child between the ages of 2 and 5. Children, Preschool,Preschool Child,Preschool Children
D004586 Electrophoresis An electrochemical process in which macromolecules or colloidal particles with a net electric charge migrate in a solution under the influence of an electric current. Electrophoreses
D005260 Female Females
D005914 Globins A superfamily of proteins containing the globin fold which is composed of 6-8 alpha helices arranged in a characterstic HEME enclosing structure. Globin
D006447 Hemoglobin H An abnormal hemoglobin composed of four beta chains. It is caused by the reduced synthesis of the alpha chain. This abnormality results in ALPHA-THALASSEMIA.
D006720 Homozygote An individual in which both alleles at a given locus are identical. Homozygotes
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults

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