The Hbbtm2(HBG1,HBB*)Tow targeted mutation (-1400 γ-βS) was created by replacing the endogenous mouse major and minor β-globin genes with both the human Aγ gene (with 1400 bp of 5' flanking sequence) and the human βS-globin gene (-1400 γ-βS). The βS gene contains an A to T mutation in the sixth codon of the human β-globin gene (resulting in a glutamic acid to valine conversion) that has been linked to sickle cell disease.
Location on chromosome (bp):
Syntenic
MGI Gene Accession ID
Please also use this link to determine if other mutants have been registered with MGI (Mouse Genome Informatics)
In ES cells that were homozygous for Hbatm1(HBA)Tow and Hbbtm2(HBG1,HBB*)Tow the human gamma chain and beta chain containing the sickle cell mutation (an A to T transversion in the sixth codon) were replaced with the human gamma chain, beta chain (lacking the sickle cell mutation) and 383 bp of sequence flanking the gamma chain. Cre-mediated recombination removed the floxed hygro cassette.
MGI Gene Accession ID
Please also use this link to determine if other mutants have been registered with MGI (Mouse Genome Informatics)
Display sickle cell disease. Mice develop anemia from 3 weeks of age. Lethality occurs at variable rates (after 3 months).
Phenotype Heterozygous State
Normal
Original Genetic Background
C57BL/6
Genetic Background Currently Maintained
C57BL/6
Strain identification
How is this strain characterised?
Genotyping
Suggested existing PCR names:
Hbatm1(HBA)Tow, Standard PCR, Hbbtm2(HBG1,HBB*)Tow/Hbbtm3(HBG1,HBB)Tow Standard PCR
Fertility and Strain maintenance
Fertility and Strain maintenance
Female
Male
Are homozygous mice viable?
Yes
Yes
Are homozygous mice fertile?
Yes
Yes
Are heterozygotes / hemizygotes* fertile?
Yes
Yes
* Hemizygote as used here refers to males carring a mutation on the X chromosome or mice of either sex
carrying an inserted transgene with no homologous allele on the other chromosome.