A 25kb deletion, generated by imprecise excision of P{lacZ}HGTXP-JG, that removes the 3' end of HGTX and the complete ORF of CG13479.
interneuron & axon & longitudinal connective
RP neuron & axon & embryo
A lineage 3 HGTXD25 mutant postembryonic neuroblast clone examined at the third larval instar stage contains the 3id axon bundle, but lacks the 3il bundle normally produced by this lineage.
In stage 16 HGTXD25 homozygous embryos, both secondary branches of the intersegmental nerve (anterior fascicle), ISNb and ISNd, are absent in a significant proportion of hemisegments. This phenotype is also seen in HGTXD25/HGTXP-JG and HGTXD25/Df(3L)fz-D21 embryos. exex expressing interneurons largely fail to project axons along the longitudinal fascicles in stage 16 HGTXD25 homozygous embryos. In HGTXD25 homozygous embryos, RP motor axons only exit the CNS 39% of hemisegments compared to 86% in wild-type. These axons often appear thinner than wild-type and the morphology of truncated axons is often aberrant - growth cones are frequently enlarged and have a club-like appearance. In 10% of mutant hemisegments, RP motor axons make dramatic guidance errors, often turning back inappropriately and extending toward the midline.
HGTXD25 is a non-enhancer of abnormal neuroanatomy | embryonic stage phenotype of Scer\GAL4elav-C155, exexUAS.cBa
HGTXD25 is a non-suppressor of abnormal neuroanatomy | embryonic stage phenotype of Scer\GAL4elav-C155, exexUAS.cBa
HGTXD25 has larval intersegmental nerve | embryonic stage 16 phenotype, non-enhanceable by exexKK30
HGTXD25 is an enhancer of presumptive embryonic/larval central nervous system phenotype of midGA174
HGTXD25 is a non-enhancer of neuron | embryonic stage | lateral phenotype of Scer\GAL4elav-C155, exexUAS.cBa
HGTXD25 is a non-suppressor of neuron | lateral | embryonic stage phenotype of Scer\GAL4elav-C155, exexUAS.cBa
A homozygous HGTXD25 mutant background does not alter the ectopic lateral fd59A[+] neurons seen when exexScer\UAS.cBa is expressed under the control of Scer\GAL4elav-C155.
Stage 15 exexKK30; HGTXD25 double mutant embryos have ectopic vnd expressing neurons in the central nervous system. exexKK30/exexKK30 does not enhance the expressivity of loss of secondary branches of the intersegmental nerve (anterior fascicle) - ISNb and ISNd - in stage 16 HGTXD25 homozygous embryos.
HGTXGAL4/HGTXD25 is partially rescued by Scer\GAL4HGTX-GAL4/HGTXUAS.cBa