Mice heterozygous for the varitint-waddler Jackson spontaneous mutation (Mcoln3Va-J) are more pigmented than the original varitint waddler mice (Mcoln3Va) and behave normally although they are deaf. They have slightly diluted coat color, a large irregular belly spot, and white feet and tail tip. Homozygous mutant mice have extensive white spotting interspersed with patches of diluted color. They are deaf but behave normally and are fertile. Compound heterozygotes of the two alleles (Mcoln3Va-J/Mcoln3Va) are similar to Mcoln3Va-J/Mcoln3Va-J mice but are smaller with more white spotting and abnormal behavior. They are deaf and circle vigorously. Viability and fertility of Mcoln3Va-J/Mcoln3Va mice are considerably reduced. This strain is also carrying the semidominant hypodactyly spontaneous mutation (Hoxa13Hd). Heterozygous hyp...Read More +
Mice heterozygous for the varitint-waddler Jackson spontaneous mutation (Mcoln3Va-J) are more pigmented than the original varitint waddler mice (Mcoln3Va) and behave normally although they are deaf. They have slightly diluted coat color, a large irregular belly spot, and white feet and tail tip. Homozygous mutant mice have extensive white spotting interspersed with patches of diluted color. They are deaf but behave normally and are fertile. Compound heterozygotes of the two alleles (Mcoln3Va-J/Mcoln3Va) are similar to Mcoln3Va-J/Mcoln3Va-J mice but are smaller with more white spotting and abnormal behavior. They are deaf and circle vigorously. Viability and fertility of Mcoln3Va-J/Mcoln3Va mice are considerably reduced. This strain is also carrying the semidominant hypodactyly spontaneous mutation (Hoxa13Hd). Heterozygous hypodactyly mutant mice are viable and fertile. Heterozygotes are missing the terminal phalanx of the first digit of the hindfoot and show variable penetrance for shortening or missing first phalanx. The forefeet are normal. Homozygous mutant mice have a single digit on each foot and greatly reduced carpals, metacarpals, tarsals, and metatarsals. The surviving digit is probably the fifth. Most homozygotes die before birth, but a few have survived to maturity but are sterile.
The mutation hypodactyly (Hoxa13Hd) arose spontaneously in strain MYA/Hu of Dr. K. P. Hummel at The Jackson Laboratory in approximately 1965. It was backcrossed onto a hybrid of C3HeB/Hu x DBAfB/Hu for 5 generations before being backcrossed onto C57BL/6J for 7 generations. The mutation Mcoln3Va-J arose spontaneously in a chromosome 3 linkage testing stock and was backcrossed onto C57BL/6J for 10 generations before crossing to C57BL/6J-Hoxa13Hd/+ at N7. This Hoxa13Hd Mcoln3Va-J stock was sibling bred for 2 generations and backcrossed once to C57BL/6J and then crossed to the B6C3Fe-a/a F1 hybrid and maintained by continued crosses to this hybrid. In 1987 B6C3F1-a/a F1 females were bred with Hoxa13Hd Mcoln3Va-J/+ + males at N5F2 to generate embryos for cryopreservation.
|Gene Symbol and Name||Hoxa13, homeobox A13|
|Gene Synonym(s)||HOX1; HOX1J; Hd; Hox-1.10; Hox-1.10; RGD1562483; homeo box-1 cluster, gene 10; hypodactyly|
|Strain of Origin||MYA/Hu|
|General Note|| |
A double mutant of the hydrocephalic-polydactyly mutation, hophpy, and the hypodactyly mutation, Hoxa13Hd, produced offspring of normal hallux phenotype. The first mutant tends to multiply, the second to eliminate halluces, and the two cancel each other (J:23839).
|Molecular Note||A 50-base pair deletion in the first exon of the Hd allele that probably arose from unequal recombination or misalignment between triplet repeats.|
|Allele Name||varitint waddler Jackson|
|Gene Symbol and Name||Mcoln3, mucolipin 3|
|Gene Synonym(s)||6720490O21Rik; 6720490O21Rik; RIKEN cDNA 6720490O21 gene; TRP-ML3; TRPML3; Va; Va; varitint-waddler; varitint-waddler|
|Strain of Origin||STOCK Mcoln3 |
|General Note||This mutation was found in a linkage cross involving Mcoln3Va, and probably arose by mutation from Mcoln3Va. (J:5286)|
|Molecular Note||This allele has a T-to-C transition at nucleotide 1085 within exon 8. This results in a change from isoleucine to threonine at amino acid 362 in the second extracellular loop. The Mcoln3Va-J allele, which arose on a strain segregating for the more severe Mcoln3Va allele, also has the G-to-C transversion at nucleotide 1255 specific to the Mcoln3Va allele indicating that the Mcoln3Va-J allele contains an additional point mutation to the Mcoln3Va allele. The less severe phenotype of the Mcoln3Va-J allele suggests that the T-to-C transition at nucleotide 1085 might mitigate the effects of the G-to-C mutation at nucleotide 1255 although the impact of genetic background must be considered. The encoded protein can be detected in the hair cells of heterozygous and homozygous mice.|
|Gene Symbol and Name||a, nonagouti|
|Gene Synonym(s)||AGSW; AGTI; AGTIL; ASP; As; As; SHEP9; agouti; agouti signal protein; agouti suppressor|
|Strain of Origin||old mutant of the mouse fancy|
|Molecular Note||Characterization of this allele shows an insertion of DNA comprised of a 5.5kb virus-like element, VL30, into the first intron of the agouti gene. The VL30 element itself contains an additional 5.5 kb sequence, flanked by 526 bp of direct repeats. The host integration site is the same as for at-2Gso and Aw-38J and includes a duplication of four nucleotides of host DNA and a deletion of 2 bp from the end of each repeat. Northern analysis of mRNA from skin of homozygotes shows a smaller agouti message and levels 8 fold lower than found in wild-type.|
McolnVa-J and Hoxa13Hd are on separate chromosomes and assort independently. The mice distributed are heterozygous carriers for either one or the other mutation, but not both.
When using the B6C3Fe-a/a Hoxa13Hd Mcoln3Va-J/J mouse strain in a publication, please cite the originating article(s) and include JAX stock #000296 in your Materials and Methods section.
|Homozygous for a,Heterozygous or Wild-type for Mcoln3<Va-J>,Heterozygous or Wild-type for Hoxa13<Hd>|
The average number of mice provided from recovery of our cryopreserved strains is 10. The total number of animals provided,
their gender and genotype will vary. We will fulfill your order by providing at least two pair of mice, at least one animal of
each pair carrying the mutation of interest. Please inquire if larger numbers of animals with specific genotype and genders
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