IthaID: 1166

Context nucleotide sequence:
CCTCTTATCTTCCTCCCACAGCTCC [A/C/G/T] GGGCAACGTGCTGGTCTGTGTGCTG (Strand: -)

Protein sequence:
MVHLTPEEKSAVTALWGKVNVDEVGGEALGRLLVVYPWTQRFFESFGDLSTPDAVMGNPKVKAHGKKVLGAFSDGLAHLDNLKGTFATLSELHCDKLHVDPENFRLPGNVLVCVLAHHFGKEFTPPVQAAYQKVVAGVANALAHKYH

Also known as: Hb Casper

Comments: Rare haemoglobin (Hb) variant reported as a de novo mutation in a handful of patients from various ethnic backgrounds. The β106 Leu>Pro substitution disrupts the alpha helix of the β-chain and alters the tertiary structure of the Hb molecule at a point where there is direct contact with heme, resulting in the loss of the heme group. The variant can be detected by isoelectric focusing (IEF) but it is electrophoretically silent in conventional Hb electrophoresis. Detection of inclusion bodies and highly unstable Hb.

We follow the HGVS sequence variant nomenclature and IUPAC standards.

Heterozygous records (preview in IthaPhen)

1. Hyde RD, Hall MD, Wiltshire BG, Lehmann H, Haemoglobin Southampton, 106 (G8) Leu leads to pro: an unstable variant producing severe haemolysis., Lancet, 2(7788), 1170-2, 1972 PubMed
2. Koler RD, Jones RT, Bigley RH, Litt M, Lovrien E, Brooks R, Lahey ME, Fowler R, Hemoglobin Casper: beta 106 (G8) Leu leads to Pro; a contemporary mutation., The American journal of medicine, 55(3), 549-58, 1973 PubMed
3. Wajcman H, Gacon G, Labie D, Koler RD, Jones RT, Isolation and functional characterization of hemoglobin Casper: beta106(G8) Leu replaced by Pro., Biochemistry, 14(22), 5017-20, 1975 PubMed
4. Didkovskiĭ NA, Idel'son LI, Filippova AV, Lemann G, [A new case of the unstable hemoglobin Southampton--Casper(beta106) (G68) leucine--proline)]., Probl Gematol Pereliv Krovi, 21(6), 48-50, 1976 PubMed
5. Heintz NH, Howard PL, Hemoglobin Southampton (Casper): characterization of the base mutation., Am. J. Hematol., 30(1), 1-3, 1989 PubMed
6. Eandi Eberle S, Noguera NI, Sciuccati G, Bonduel M, Díaz L, Staciuk R, Feliu-Torres A, Hb Southampton [beta106(G8)Leu-->Pro, CTG-->CCG] in an Argentinean boy., Hemoglobin, 30(3), 401-3, 2006 PubMed
7. Avalos Gómez V, Eandi Eberle S, Pepe C, Sciuccati G, García Rosolen N, Cervio C, Díaz L, Candás A, Bonduel M, Piazza G, Chaves D, Feliú Torres A, [Severe hemolytic anemia due to hemoglobin Southampton: case report]., Arch Argent Pediatr, 110(5), e91-4, 2012 PubMed
8. Pereira JA, López P, Costa FF, Sans M, Sonati Mde F, Hb Southampton [B106(G8)Leu→PRO, CTG→CCG] in a Uruguayan woman., Rev Bras Hematol Hemoter, 35(2), 146-7, 2013 PubMed
9. Haque A, Quint DJ, Castle VP, Leber SM, Another Rare Unstable Hemoglobinopathy: Hemoglobin Casper/Southampton Associated with Moyamoya Disease., Cerebrovasc Dis Extra, 5(2), 52-4, 2015 PubMed
10. Liu J, Huang Y, Lei Y, Lai Y, Hb Southampton [β106(G8)Leu→Pro; HBB: c.320T>C] and Codons 41/42 (-TTCT; HBB: c.124_127delTTCT) in a Chinese Girl., Hemoglobin, 41(2), 134-136, 2017 PubMed