It is important to note that cell-autonomous deletion of Notch signaling within the BHPCs, as demonstrated here, might not reflect the AGS genetic situation.
Cell-autonomous deletion of GSK-3 reproduced the migration defect and revealed a neuronal morphology defect (the authors argue for dendrite orientation defects), as well as the persistence of the migration defects in postnatal animals.
The proteins may be provided in trans from active autonomous (intact) elements to allow the transposition of non-autonomous (deletion derivatives) elements, as long as they retain the cis-acting target sequences.
They form a high copy number, homogenous family of non-autonomous elements (also called miniature terminal inverted-repeat transposable elements, or MITEs), which likely result from amplification of an internally-deleted autonomous copy (deletion breakpoints occur at position 36 and 2337 of the consensus OC1_Das), a process typical of Class II transposons [ 9].
However, Mx1 and Gt ROSA)26Sor are expressed in multiple tissues and do not provide information on the effects of cell autonomous Tsc1 deletion in the RBC lineage.
We revealed the underlying mechanism for preventing RF1 knockout, and generated autonomous RF1 deletion strains valuable for studying code evolution and for genome recoding.
Different from Ac/Ds and Spm/dSpm transposable elements where the non-autonomous elements are deletion derivatives of the autonomous elements, the internal sequences between TIRs among Mu elements are often unrelated.
Special TE families are the MITEs (Miniature Inverted-repeat Tranposable Elements), non-autonomous class II TEs of short length, which are thought to have evolved from autonomous TEs by deletion of their transposase ORF [ 15].
This is significantly different from the EhLINE1/EhSINE1 case where only approx 70 bp at the 3'end are shared, and suggests that in the trypanosomatid case, the small nonautonomous elements were also derived from the autonomous ones by 3' deletion [ 26].
The defective Spm (dSpm) or Inhibitor (I) elements are non-autonomous, generally internal deletion derivatives, that transpose only if an active Spm/En is present elsewhere in the genome to provide the trans-active Suppressor and Mutator functions of the element [ 3].
***p<0.001 DOI: http://dx.doi.org/10.7554/eLife.07539.006 To rule out non-cell autonomous effects of Ddb1 deletion (i.e. effects in HSC niches), we transplanted cells from non-polyI C inon-polyI C1 f/f::Mx1Cre +minjected lethally irraDdb1ed wild type recipient mice.
