Nucleotide substitution: C7762T. Amino acid replacement: S311F.
C14806T
C7762T
S311F | l(2)gl-PA; S303F | l(2)gl-PB; S311F | l(2)gl-PC; S262F | l(2)gl-PD; S262F | l(2)gl-PE; S262F | l(2)gl-PF; S311F | l(2)gl-PG; S311F | l(2)gl-PH; S311F | l(2)gl-PI; S311F | l(2)gl-PJ; S311F | l(2)gl-PK
S311F
Site of nucleotide substitution in mutant inferred by FlyBase based on reported amino acid change.
When l(2)gl4/l(2)glts3 flies are cultivated at 27.5[o]C, the temperature-sensitive l(2)glts3 partially loses its activity, and 86% of individual flies successfully develop into adulthood. Approximately 28% of l(2)gl4/l(2)glts3 flies carry at least one defective extrasensory bristle, such as a duplicated bristle or a socket without a bristle, as a result of the partial loss of l(2)gl at the semi-restrictive temperature of 27.5[o]C.
The polarity of the dorsal leading edge cells of the embryonic epidermis is disrupted, though other ectodermal cells are normal. Embryos reared at 29oC show failures of dorsal closure and failure of head involution. Cephalopharyngeal skeleton and filzkorper can be absent or not externalized, respectively. 58% of cuticles show a dorsal hole. Denticle belts are extended, reaching up to 60% of lateral extension in some mutant individuals. Rare embryos show the phenotype of partly lacking ventral epidermis. Less than 8% of cuticles show patches of denticle belt fusion or naked cuticle, indicating that on the whole wg and hh signaling are unaffected.
Exposure to 29oC during external sensory organ development causes transformation of inner cells to outer cells causing double socket and hair phenotypes.
Ovaries of l(2)glts3 females shifted to 29oC immediately after hatching and reared at 29oC for 2 days are severely reduced in size, due to a lack of late stage egg chambers.
The majority of intact wing imaginal discs cultured in vivo at 15oC remain morphologically normal but show no significant growth. The majority of intact discs grown at 29oC become abnormal and show signs of growth. Culture of amputated discs at 15oC generates abnormal discs. Gamma irradiated discs (whole or amputated) become abnormal after in vivo culture at 15oC but show no significant growth. l(2)glts1/l(2)glts3 and l(2)glts2/l(2)glts3 heteroallelic females exhibit normal morphology of ovaries and developing egg chambers. Heterozygous females lay normal eggs at 22oC and 29oC. At 29oC the eggs fail to develop into viable larvae. None of the unhatched eggs show differentiated larval cuticles. Embryos stop developing at the stage of germ band formation, none of the embryos exhibit dorsal closure and differentiation of the larval hypodermis. None of the embryos have developed a well defined CNS.
Lethality of heterozygotes with Df(2L)net62 when raised at 29oC is complete. Homozygous mutant larvae produced at 29oC pupariate on a normal timetable and die during the early pupal stages. Male homozygotes and heterozygotes with l(2)glts1 or l(2)glts2 show male sterility when raised at 27oC. Genitalia are incompletely rotated, disorganized and protruding. Mutant embryos from mutant mothers show developmental block at germ band shortening. Head involution fails but segmentation progresses normally. Cell shape changes at the heading edge of the dorsal epidermis fail to occur, reminiscent of zip and scb mutant phenotypes. Midgut is hypertrophied and the yolk remains incompletely digested. The visceral mesoderm is apparently normal. Midgut cells arrest their differentiation early. Causes a temperature sensitive reduction in female fertility. Oogenesis blocks at stage 7-8 in females raised at 29oC for 6 days. Blocked egg chambers show a multilayered accumulation of probably follicular cells at the anterior and posterior tips. These cells become internalized into the space normally occupied by the ooplasm. The germarium becomes fused with the youngest egg chambers.
l(2)glts3 has lethal phenotype, suppressible by Dpse\l(2)gl+t12.2
l(2)glts3/Df(2L)net62 has lethal | heat sensitive phenotype, suppressible by Dpse\l(2)gl+t12.2
l(2)glts3/l(2)gl[+] is a suppressor | partially of abnormal neuroanatomy | third instar larval stage phenotype of Ankle2A
l(2)glts3/l(2)gl[+] is a suppressor | partially of increased mortality during development | temperature conditional phenotype of Ankle2A
l(2)glts3/l(2)gl[+] is a suppressor of abnormal size | third instar larval stage phenotype of Scer\GAL4Act5C.PI, ZIKV\NS4AUAS.Tag:HA
l(2)glts3/l(2)gl[+] is a suppressor of abnormal neuroanatomy | third instar larval stage phenotype of Scer\GAL4Act5C.PI, ZIKV\NS4AUAS.Tag:HA
Ankle2A, l(2)glts3/l(2)gl[+] has partially lethal - majority die phenotype
Ankle2A, l(2)glts3/l(2)gl[+] has short lived phenotype
l(2)glts3/l(2)gl4, mts02496 has abnormal eclosion rhythm phenotype
l(2)glts3/l(2)gl4, mtsXE-2258 has abnormal eclosion rhythm phenotype
l(2)glts3/l(2)gl4 has mechanosensory chaeta | heat sensitive phenotype, enhanceable by mts02496
l(2)glts3/l(2)gl4 has mechanosensory chaeta | heat sensitive phenotype, enhanceable by mtsXE-2258
l(2)glts3 has tormogen cell phenotype, enhanceable by numb[+]/numb2
l(2)glts3 has external sensory organ phenotype, enhanceable by numb[+]/numb2
l(2)glts3/l(2)gl[+] is a suppressor | partially of larval brain | third instar larval stage phenotype of Ankle2A
l(2)glts3/l(2)gl[+] is a suppressor | partially of larval brain | third instar larval stage phenotype of Scer\GAL4Act5C.PI, ZIKV\NS4AUAS.Tag:HA
l(2)glts3 is a suppressor of embryonic epidermis phenotype of Scer\GAL4en-e16E, dppUAS.cSa
l(2)glts3 is a suppressor of embryonic epidermis phenotype of Scer\GAL4prd.RG1, dppUAS.cSa
l(2)glts3 is a non-suppressor of embryonic epidermis phenotype of Scer\GAL4prd.RG1, tkvQ253D.UAS.cNb
l(2)glts3, numbhs.PU has external sensory organ phenotype
l(2)glts3, numbhs.PU has tormogen cell phenotype
The addition of one copy of mts02496 or mtsXE-2258 to l(2)gl4/l(2)glts3 flies reduces the eclosion rate to 72% and 42% respectively.
The presence of one copy of mts02496 or mtsXE-2258 in l(2)gl4/l(2)glts3 flies increases the frequency of defective bristle formation to 33% and 64% respectively (compared to 28% in l(2)gl4/l(2)glts3 mutants).
Lethality with Df(2L)net62 can be completely rescued by Dpse\l(2)gl+t12.2. Neither giant larvae nor tumorous brain\imaginal discs are observed.
Baek and Hanratty
l(2)glts3 has been used to show that the l(2)gl product is required both during embryonic (stage 8-12) and larval (third instar) life.