Spectrin Jendouba: an alpha II/31 spectrin variant that is associated with
elliptocytosis and carries a mutation distant from the dimer self-
association site
N Alloisio, R Wilmotte, L Morle, F Baklouti, J Marechal, MT Ducluzeau, L Denoroy, C Feo, BG Forget and R Kastally
CNRS URA 1171, Faculte de Medecine Grange-Blanche, Lyon, France.
Spectrin Jendouba (alpha II/31) was found in a Tunisian family. In the
heterozygous state, it is associated with asymptomatic elliptocytosis and a
minimal defect in spectrin dimer self-association. On partial digestion of
spectrin with trypsin, an abnormal cleavage appeared following Lys 788.
Peptide and DNA sequencing indicated that the responsible mutation is alpha
791 Asp----Glu (GAC----GAA). As in most alpha-spectrin variants associated
with elliptocytosis, the change alters helix 3 of the proposed triple
helical model of spectrin structure. Modified helix 3 in repeat alpha 8 is
the most distant from the N-terminus of alpha-spectrin in known variants
associated with elliptocytosis.
Volume 80,
Issue 3,
pp. 809-815,
08/01/1992
Copyright © 1992 by The American Society of Hematology