Table 1.
Identification of a point mutation in the Bcl2 gene on Chr1 as the causative mutation for the WE phenotype
Mouse ID numberPhenotypeMutations
Arg2Bcl2aErbp4Lama1Naip2Satb2Slc15a2
chr12:80248736chr1:108609405achr1:68607208chr17:68102223chr13:1000931864chr1:56907005chr16:36772531
LymphopeniaDepigmentationA → TT → CaG → AG → AA → TG → AA → G
9610 Yes Yes  Yesa Yesa Nob Nob Yesa 
9184 No No  Noa Noa Yesb Yesb Yesb Noa Yesb 
9564 Yes Yes  Nob Yesa Nob Nob 
9611 Yes Yes  Yesa Nob Nob Nob Yesa 
9559 Yes Yes  Yesa Yesa Nob Nob Nob 
9607 Yes Yes  Nob Yesa Nob Nob Yesa 
Mouse ID numberPhenotypeMutations
Arg2Bcl2aErbp4Lama1Naip2Satb2Slc15a2
chr12:80248736chr1:108609405achr1:68607208chr17:68102223chr13:1000931864chr1:56907005chr16:36772531
LymphopeniaDepigmentationA → TT → CaG → AG → AA → TG → AA → G
9610 Yes Yes  Yesa Yesa Nob Nob Yesa 
9184 No No  Noa Noa Yesb Yesb Yesb Noa Yesb 
9564 Yes Yes  Nob Yesa Nob Nob 
9611 Yes Yes  Yesa Nob Nob Nob Yesa 
9559 Yes Yes  Yesa Yesa Nob Nob Nob 
9607 Yes Yes  Nob Yesa Nob Nob Yesa 

Whole-exome sequencing was performed on the DNA of one ENU-198 G5 mouse displaying the WE phenotype. All the mutations that were also found in six other mice from other pedigrees in our ENU mutagenesis program were excluded. The seven homozygous point mutations, which were selectively found in the WE mouse, are presented in this table. To identify the mutation responsible for the WE phenotype, we analyzed the presence of these mutations in other ENU-198 G5 animals displaying (for mice 9610, 9564, 9611, 9559, and 9607) or not displaying (9184) the WE phenotype (lymphopenia and hair hypopigmentation). The homozygous mutation in the Bcl2 gene (A1463G) is the only one, which was strictly associated with the WE phenotype. The whole Bcl2 gene was also sequenced in another WE mutant mouse. The A1463G mutation was the only mutation present in the Bcl2 gene.

a

Genotypes for the indicated genes and WE phenotype are consistent.

b

Genotypes for the indicated genes and WE phenotype are discordant.

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