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Cyp1atm1Dwn
Targeted Allele Detail
Nomenclature
Symbol: Cyp1atm1Dwn
Name: cytochrome P450, family 1, subfamily a cluster; targeted mutation 1, Daniel W Nebert
MGI ID: MGI:3721229
Synonyms: Cyp1a1/1a2-, Cyp1a2/Cyp1a1tm2Dwn, Del(9Cyp1a2-Cyp1a1)1Dwn
Gene: Cyp1a  Location: unknown  Genetic Position: Chr9, Syntenic
Mutation
origin
Germline Transmission:  Earliest citation of germline transmission: J:122409
Parent Cell Line:  Not Specified (ES Cell)
Strain of Origin:  129P2/OlaHsd or 129S6/SvEvTac
Mutation
description
Allele Type:    Targeted (Null/knockout)
Mutation:    Intergenic deletion
  Cyp1atm1Dwn involves 2 genes/genome features (Cyp1a2, Cyp1a1) View all
 
Mutation detailsThe Cyp1a2(t) targeted allele (J:122409) was generated using a targeting vector designed to insert a loxP-flanked PGK-NEO cassette 350 bp downstream of the endogenous stop codon (about 60 bp 3' of exon 7). The construct was electroporated into 129S6/SvEvTac-derived embryonic stem (ES) cells which were microinjection into C57BL/6 blastocysts. The chimeras were bred with C57BL/6 to generate Cyp1a2(t) mutant mice. To create the Cyp1a1 targeted allele (J:59398), a targeting vector was designed to insert a loxP-flanked hypoxanthine phosphoribosyltransferase (HPRT) minigene in intron 1 and a loxP site downstream of the termination codon in exon 7. Following electroporation into E14TG2a (HPRT-) ES cells and ES cell microinjection into the blastocoele cavity of C57BL/6J embryos, chimeric males were bred with C57BL/6J females. As described in J:86748, these Cyp1a1(t) mutant mice were then bred to a Cre-deleter strain (CAGGS-CRE, mixed C57BL/6J and FVB/NJ genetic background). The resulting transgenic mice found to be heterozygous for the floxed null Cyp1a1(-) allele (containing only exon 1, a portion of intron 1, and one remaining loxP site in the 3' UTR) were bred to mice heterozygous for the Cyp1a2(t) allele (as described in J:122409). Mutant mice (Cyp1a2(t), Cyp1a1(-), CAGGS-CRE) were bred to C57BL/6. Because of the close genomic position of these two genes, offspring having undergone Cre recombinase-mediated interchromosomal recombination between the loxP sites 3' beyond the stop codons of the Cyp1a2 and Cyp1a1 genes could be selected. Such mice were backcrossed to C57BL/6 for 10 generations (while selecting against the Cre-deleter transgene) to generate Cyp1a1/1a2 mutant mice. (J:59398, J:86748, J:122409)
Phenotypes
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View phenotypes and curated references for all genotypes (concatenated display).
Expression
In Structures Affected by this Mutation: 3 anatomical structures
Find Mice (IMSR)
Mouse strains and cell lines available from the International Mouse Strain Resource (IMSR)
Carrying this Mutation:  Mouse Strains: 2 strains available      Cell Lines: 0 lines available
Carrying any Cyp1a Mutation:  0 strains or lines available
References
Original:  J:122409 Dragin N, et al., Generation of 'humanized' hCYP1A1_1A2_Cyp1a1/1a2(-/-) mouse line. Biochem Biophys Res Commun. 2007 Aug 3;359(3):635-42
All:  16 reference(s)

Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB), Gene Ontology (GO)
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last database update
11/16/2021
MGI 6.17
The Jackson Laboratory