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2013 ; 14
(9
): R96
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An ENU mutagenesis screen identifies novel and known genes involved in epigenetic
processes in the mouse
#MMPMID24025402
Daxinger L
; Harten SK
; Oey H
; Epp T
; Isbel L
; Huang E
; Whitelaw N
; Apedaile A
; Sorolla A
; Yong J
; Bharti V
; Sutton J
; Ashe A
; Pang Z
; Wallace N
; Gerhardt DJ
; Blewitt ME
; Jeddeloh JA
; Whitelaw E
Genome Biol
2013[]; 14
(9
): R96
PMID24025402
show ga
BACKGROUND: We have used a sensitized ENU mutagenesis screen to produce mouse
lines that carry mutations in genes required for epigenetic regulation. We call
these lines Modifiers of murine metastable epialleles (Mommes). RESULTS: We
report a basic molecular and phenotypic characterization for twenty of the Momme
mouse lines, and in each case we also identify the causative mutation. Three of
the lines carry a mutation in a novel epigenetic modifier, Rearranged L-myc
fusion (Rlf), and one gene, Rap-interacting factor 1 (Rif1), has not previously
been reported to be involved in transcriptional regulation in mammals. Many of
the other lines are novel alleles of known epigenetic regulators. For two genes,
Rlf and Widely-interspaced zinc finger (Wiz), we describe the first mouse
mutants. All of the Momme mutants show some degree of homozygous embryonic
lethality, emphasizing the importance of epigenetic processes. The penetrance of
lethality is incomplete in a number of cases. Similarly ,abnormalities in
phenotype seen in the heterozygous individuals of some lines occur with
incomplete penetrance. CONCLUSIONS: Recent advances in sequencing enhance the
power of sensitized mutagenesis screens to identify the function of previously
uncharacterized factors and to discover additional functions for previously
characterized proteins. The observation of incomplete penetrance of phenotypes in
these inbred mutant mice, at various stages of development, is of interest.
Overall, the Momme collection of mouse mutants provides a valuable resource for
researchers across many disciplines.