Nucleotide substitution: ?3850?.
Amino acid replacement: ??term.
Mutation resulting in the truncation of the protein after amino acid 680.
Nucleotide substitution: C3850T.
C1894612T
C3850T
Q681term | arm-PA; Q681term | arm-PB; Q681term | arm-PC; Q681term | arm-PD; Q681term | arm-PE; Q681term | arm-PF
?681term
adult cuticle & abdomen | somatic clone
Maternally and zygotically mutant arm2 embryos (coming from mothers whose whole germline constitutes from arm2 mutant cells only - created by the OvoD germline clone technique) show a segment polarity phenotype and no naked cuticle between denticle belts on the ventral epidermis (resulting in a lawn of denticles).
Denticle belt patterning is abolished in arm2 mutants, with all cells secreting a single denticle and having a similar shape, with the planar distribution of markers being uniform around the cell margins.
arm2 homozygotes exhibit dorsal closure defects characterised by small holes in the dorsal epithelium. Mutant larvae also have a fully penetrant cuticle phenotype, characterised by shortened cuticle, severe segment polarity defects (resulting in a lawn of denticles replacing well-separated denticle belts), a hole in the head region, and a naked cuticle from the anterior end to the third thoracic segment.
arm2 heterozygotes do not exhibit a visible phenotype nor a reduction in viability.
Embryos mutant for arm2 both maternally and zygotically display loss of naked regions of the embryonic cuticle.
arm2/Y embryos have a lawn of denticles phenotype.
Mutant embryos have a "lawn of denticles" cuticle phenotype.
When homozygous mutant germ-line clones are made, embryos exhibit cuticles that are covered with denticles.
When arm2 clones are made in the tergites of the adult abdomen, the clone is transformed to form large pleural hairs and cuticle. The polarity of the front of the clone, and of some wild-type cells anterior to the cones is reversed.
arm2 has no dramatic effect on germline stem cell (GSC) maintenance in the ovary; approximately 60% of mutant GSCs observed during the first week after clone induction are maintained for two more weeks (compared to 70% for controls).
The middle gut constriction is missing in mutant embryos.
Has no effect on the eye phenotype produced by activated arm constructs. (either armS44Y.GMR or armS56F.GMR).
Embryos derived from females with arm2 homozygous germline clones and carrying Scer\GAL4arm.PS crossed to males carrying armΔ.Scer\UAS.T:Ivir\HA1 produce embryos with 4 different cuticle phenotypes; small abnormally shaped, denticle covered cuticles (25%, characteristic of arm2), naked cuticles (25%, characteristic of activated arm), wild-type cuticles (25%) and a phenotype where the embryo shows the cell transformations to naked cuticle, but is small and abnormally shaped (25%). This last phenotype seems to be intermediate between the naked and arm2 phenotype.
Zygotic arm2 mutants show 3 main kinds of tracheal defects; the dorsal trunk (DT) is completely missing or very much reduced, there are no branch fusions and therefore the ten tracheal metameres are completely disconnected and the ganglionic branch is misrouted. The lateral trunk and dorsal branches fail to fuse. The presumptive DT cells invaginate perfectly in mutant embryos, but do not migrate or join with other branches. Most DT cells remain clustered in the position where the DT is normally formed. Embryos derived from homozygous female germline clones show defects in tracheal invagination.
Mutant embryos show dorsal closure defects.
Embryos maternally and zygotically homozygous for arm2 are dramatically reduced in size compared to wild type amd all surviving ventral cells secrete denticles.
Homozygous embryos derived from homozygous female germ line clones have a lawn of denticles phenotype, in which all naked cuticle has been replaced by denticles.
Embryos zygotically and maternally mutant for arm2 show a complete absence of heart precursors.
Homozygous clones in the eye are extremely small and only infrequently observed.
Homozygotes show a weak zygotic segment polarity phenotype that is enhanced to a severe phenotype on removal of the maternal arm+ contribution. Hemizygous embryos derived from homozygous female germline clones have a strong segment polarity phenotype.
Homozygous larvae have denticle lawns composed of large denticles. Homozygous larvae derived from embryos in which spis.Scer\UAS is expressed under the control of Scer\GAL4arm.PS have denticle lawns composed of small denticles.
Homozygous clones in the eye have interommatidial bristles.
In homozygous embryos the second constriction is missing.
Only one central invagination fold of the stomodeal invagination is observed.
Embryos exhibit a lawn of denticle belts.
Embryos lacking both maternal and zygotic sgg and arm function have an embryonic cuticle phenotype like that of arm mutant embryos alone. Embryos lacking maternal sgg and arm but receiving wild type paternal copies develop into normal embryos that survive until adulthood. Embryos lacking maternal sgg and arm but receiving a wild type paternal copy of arm+ only, show a sgg naked cuticle phenotype.
Moderate segment polarity phenotype. Homozygous clones survive at a higher frequency in areas of low wg expression, dorsal regions of the leg disc. Biased distribution is produced by differential survival, not directed migration. Flies carrying one copy of P{arm10.5} survive to late pupal development with a wg-like phenotype.
Shows effects on segment polarity, head development and dorsal closure. The embryo is slightly shorter than wild type.
Head and dorsal closure defects. Abnormal oogenesis.
Clones of homozygous arm2 induced by mitotic recombination form denticles with reversed polarity. Changes in cell fate are autonomous at the level of single cells.
arm2 has segment polarity phenotype | embryonic stage | maternal effect phenotype, non-enhanceable by sggKK-MI.UAS.Tag:Myr(Src64B),Tag:HA/Scer\GAL4arm.PU
arm2 has segment polarity phenotype | embryonic stage | maternal effect phenotype, non-enhanceable by sggUAS.Tag:HA/Scer\GAL4arm.PU
arm2 has segment polarity phenotype | embryonic stage | maternal effect phenotype, non-enhanceable by sggUAS.Tag:Myr(Src64B),Tag:HA/Scer\GAL4arm.PU
arm2 has segment polarity phenotype | maternal effect | embryonic stage phenotype, non-suppressible by sggKK-MI.UAS.Tag:Myr(Src64B),Tag:HA/Scer\GAL4arm.PU
arm2 has segment polarity phenotype | maternal effect | embryonic stage phenotype, non-suppressible by sggUAS.Tag:HA/Scer\GAL4arm.PU
arm2 has segment polarity phenotype | maternal effect | embryonic stage phenotype, non-suppressible by sggUAS.Tag:Myr(Src64B),Tag:HA/Scer\GAL4arm.PU
arm2 is an enhancer of visible phenotype of Scer\GAL4en-e16E, shgi.UAS.Tag:SS(aos),Tag:MYC
arm2/arm[+] is a non-enhancer of abnormal planar polarity phenotype of Scer\GAL4hs.2sev, nmoUAS.cUa
arm2 is a non-enhancer of abnormal cell polarity phenotype of Scer\GAL4hs.2sev, shgdCR3h.UAS.sgGFP
arm2/arm[+] is a suppressor | partially of abnormal size phenotype of Scer\GAL4pnr-MD237, hepUAS.cBa
arm2/arm[+] is a suppressor | partially of visible phenotype of Scer\GAL4pnr-MD237, hepUAS.cBa
arm2/arm[+] is a suppressor of abnormal size phenotype of Scer\GAL4GMR.PF, hepCA.UAS
arm2/arm[+] is a suppressor of visible phenotype of Scer\GAL4GMR.PF, hepCA.UAS
arm2/arm[+] is a suppressor of increased cell number | female | adult stage | heat sensitive phenotype of Mmp2Y53N/Mmp2W307stop
arm2 is a suppressor of visible phenotype of Hsap\HTT128Q.1-336.UAS, Scer\GAL4GMR.PU
arm2/arm[+] is a non-suppressor of abnormal planar polarity phenotype of Scer\GAL4hs.2sev, nmoUAS.cUa
arm2 has denticle field | embryonic stage | maternal effect phenotype, non-enhanceable by sggUAS.Tag:Myr(Src64B),Tag:HA/Scer\GAL4arm.PU
arm2 has embryonic/larval cuticle | embryonic stage | maternal effect phenotype, non-enhanceable by sggKK-MI.UAS.Tag:Myr(Src64B),Tag:HA/Scer\GAL4arm.PU
arm2 has denticle field | embryonic stage | maternal effect phenotype, non-enhanceable by sggKK-MI.UAS.Tag:Myr(Src64B),Tag:HA/Scer\GAL4arm.PU
arm2 has embryonic/larval cuticle | embryonic stage | maternal effect phenotype, non-enhanceable by sggUAS.Tag:HA/Scer\GAL4arm.PU
arm2 has denticle field | embryonic stage | maternal effect phenotype, non-enhanceable by sggUAS.Tag:HA/Scer\GAL4arm.PU
arm2 has embryonic/larval cuticle | embryonic stage | maternal effect phenotype, non-enhanceable by sggUAS.Tag:Myr(Src64B),Tag:HA/Scer\GAL4arm.PU
arm2 has denticle | ectopic | germline clone phenotype, non-enhanceable by sggM11
arm2 has embryonic/larval tracheal dorsal trunk phenotype, suppressible by salmUAS.cBa/Scer\GAL4btl.PS
arm2 has phenotype, suppressible by Xlae\ctnnb1.LUAS.cCa/Scer\GAL4e22c
arm2 has embryonic epidermis phenotype, suppressible by pan2
arm2 has ventral denticle belt phenotype, suppressible by pan2
arm2 has embryonic epidermis phenotype, suppressible by pan3
arm2 has ventral denticle belt phenotype, suppressible by pan3
arm2 has embryonic/first instar larval cuticle phenotype, suppressible by tshUAS.cGa/Scer\GAL469B
arm2 has embryonic/first instar larval cuticle phenotype, suppressible by Mmus\Ctnnb1arm.PW
arm2 has embryonic/first instar larval cuticle phenotype, suppressible by Scer\GAL4arm.PS/Mmus\Ctnnb1UAS.cWa
arm2 has embryonic/larval cuticle | maternal effect | embryonic stage phenotype, non-suppressible by sggUAS.Tag:Myr(Src64B),Tag:HA/Scer\GAL4arm.PU
arm2 has embryonic/larval cuticle | maternal effect | embryonic stage phenotype, non-suppressible by sggKK-MI.UAS.Tag:Myr(Src64B),Tag:HA/Scer\GAL4arm.PU
arm2 has embryonic/larval cuticle | maternal effect | embryonic stage phenotype, non-suppressible by sggUAS.Tag:HA/Scer\GAL4arm.PU
arm2 has denticle field | maternal effect | embryonic stage phenotype, non-suppressible by sggUAS.Tag:Myr(Src64B),Tag:HA/Scer\GAL4arm.PU
arm2 has denticle field | maternal effect | embryonic stage phenotype, non-suppressible by sggKK-MI.UAS.Tag:Myr(Src64B),Tag:HA/Scer\GAL4arm.PU
arm2 has denticle field | maternal effect | embryonic stage phenotype, non-suppressible by sggUAS.Tag:HA/Scer\GAL4arm.PU
arm2 has embryonic/first instar larval cuticle | maternal effect phenotype, non-suppressible by sggM11
arm2 has embryonic/first instar larval cuticle phenotype, non-suppressible by GαoGTP.hs
arm2 has ventral denticle belt phenotype, non-suppressible by GαoGTP.hs
arm2 has denticle | ectopic | germline clone phenotype, non-suppressible by sggM11
arm2 has embryonic/first instar larval cuticle phenotype, non-suppressible by Hsap\JUParm.PW
arm2 has embryonic/first instar larval cuticle phenotype, non-suppressible by Scer\GAL4arm.PS/Hsap\JUPUAS.cWa
arm2 is an enhancer of wing phenotype of Scer\GAL4en-e16E, shgi.UAS.Tag:SS(aos),Tag:MYC
arm2/arm[+] is an enhancer of wing phenotype of Scer\GAL4en-e16E, shgUAS.cSa
arm2/arm[+] is a non-enhancer of ommatidium phenotype of Scer\GAL4hs.2sev, nmoUAS.cUa
arm2 is a non-enhancer of embryonic/first instar larval cuticle | maternal effect phenotype of l(2)gl4
sggM11/arm2 is a non-enhancer of embryonic/first instar larval cuticle phenotype of l(2)gl4
arm2 is a non-enhancer of ommatidium phenotype of Scer\GAL4hs.2sev, shgdCR3h.UAS.sgGFP
arm2/arm[+] is a suppressor | partially of scutellum phenotype of Scer\GAL4pnr-MD237, hepUAS.cBa
arm2/arm[+] is a suppressor of eye phenotype of Scer\GAL4GMR.PF, hepCA.UAS
arm2/arm[+] is a suppressor of stalk follicle cell | increased number | heat sensitive phenotype of Mmp2Y53N/Mmp2W307stop
arm2 is a suppressor of eye phenotype of Hsap\HTT128Q.1-336.UAS, Scer\GAL4GMR.PU
arm2 is a suppressor of dorsal tracheal branch primordium phenotype of DadUAS.cTa, Scer\GAL4btl.PS
arm2 is a suppressor of ventral denticle belt | anterior phenotype of nej3
arm2/arm[+] is a non-suppressor of ommatidium phenotype of Scer\GAL4hs.2sev, nmoUAS.cUa
arm2 is a non-suppressor of embryonic/first instar larval cuticle | maternal effect phenotype of l(2)gl4
sggM11/arm2 is a non-suppressor of embryonic/first instar larval cuticle phenotype of l(2)gl4
arm2 is a non-suppressor of ommatidium phenotype of Rac1V12.hs.sev
arm2 is a non-suppressor of phenotype of dshhs.sev.B
arm2, armS8, sggM11 has cuticle | germline clone phenotype
arm2/armS8, sggM11 has cuticle | germline clone phenotype
Scer\GAL4αTub84B.PP, arm2, ciUAS.cAa has embryonic/first instar larval cuticle | germline clone phenotype
Scer\GAL4αTub84B.PP, arm2, ciUAS.cAa has mesothoracic ventral denticle belt | germline clone phenotype
Scer\GAL4αTub84B.PP, arm2, ciUAS.cAa has metathoracic ventral denticle belt | germline clone phenotype
Scer\GAL4αTub84B.PP, arm2, ciUAS.cAa has prothoracic ventral denticle belt | germline clone phenotype
arm2, tkv8 has larval tracheal system phenotype
The segment polarity phenotype and the lack of naked cuticle between denticle belts, resulting in a lawn of denticles on the ventral epidermis, characteristic for maternally and zygotically mutant arm2 embryos is not modified by Scer\GAL4arm.PU-driven expression of any of the following: sggScer\UAS.T:Myr-Src64B,T:Ivir\HA1, sggKK-MI.Scer\UAS.T:Myr-Src64B,T:Ivir\HA1 or sggScer\UAS.T:Ivir\HA1.
The increase in average cell number in the stalks between egg chambers which is seen in Mmp2Y53N/Mmp2W307stop females after being shifted to the restrictive temperature is dominantly suppressed if the females also carry a single copy of arm2.
Approximately 90% of arm2; p130CAS1 flies exhibit smaller cuticles than arm2 mutants. Among these, 82% complete lack cuticle in the head region, and 65% have enhanced posterior curvature suggesting a strong germband retraction phenotype. While 40% of arm2 ; p130CAS1 flies retain the lawn of denticles characteristic of an arm2 homozygous mutant, 34% exhibit complete deletion of ventral and dorsal denticle belts, while 36% have well-separated posterior denticle belts.
arm2 p130CAS1 double heterozygotes do not exhibit a visible phenotype nor a reduction in viability.
Embryos double mutant for arm2 both maternally and zygotically and l(2)gl4 zygotically display a cuticle phenotype similar to that of l(2)gl4 single mutants.
Cuticles of embryos double mutant maternally and zygotically for both sggM11 and arm2 resemble that of arm2 single mutants.
Embryos triple mutant for sggM11 both maternally and zygotically and arm2 both maternally and zygotically and l(2)gl4 zygotically show a cuticle phenotype that is similar to that of zygotic l(2)gl4 single mutants.
An arm2 background does not enhance the Scer\GAL4hs.2sev>shgdCR3h.Scer\UAS.T:Avic\GFP-rs eye phenotype; arm2 does not affect cell architecture in single mutants.
The lawn of denticles phenotype seen in arm2/Y embryos is not affected by expression of G-oα47AGTP.hs using heat shock.
Embryos expressing DadScer\UAS.cTa under the control of Scer\GAL4btl.PS in an arm2 background show outgrowth of the dorsal branches, cell intercalation and autocellular adherens junction formation in the tracheal system.
The addition of ciScer\UAS.cAa (driven by Scer\GAL4αTub84B.PP) to arm2 germ-line clones, can suppress denticle belt formation in the thorax of mutant embryos but not in the abdomen.
Expression of salmScer\UAS.cdCa under the control of Scer\GAL4btl.PS partially rescues the lack of dorsal trunk (DT) seen in the tracheal system of arm2 embryos. DT cells are able to migrate anteriorly and posteriorly in these rescued embryos, but the branches do not fuse. The formation of all tracheal branches except the transverse connective and visceral branch is impaired in arm2 ; tkv8 double mutants.
The lawn of denticles phenotype of arm2 embryos derived from arm2 female germ line clones is partly suppressed if the embryos are also expressing tshScer\UAS.cGa under the control of Scer\GAL469B.
Dominantly enhances the wing margin phenotype of shgScer\UAS.cSa,Scer\GAL4en-e16E. Reduced denticle belt phenotype of nej3 is suppressed in double mutants with arm2.
Xlae\β-catScer\UAS.cCa partially rescues the phenotype of embryos that are maternally and zygotically mutant for arm2, when expressed under the control of Scer\GAL4e22c.
The segment polarity cuticle phenotype of embryos derived from homozygous arm2 female germline clones is partially rescued by Mmus\Catnbarm.PW and not rescued by Hsap\JUParm.PW, when the transgene is provided maternally. The phenotype of these embryos is also partially rescued by Mmus\CatnbScer\UAS.cWa expressed under the control of Scer\GAL4arm.PS and is not rescued by Hsap\JUPScer\UAS.cWa expressed under the control of Scer\GAL4arm.PS.
arm2 is rescued by armTag:MYC,Tag:PM(hKRAS)
arm2 is rescued by Scer\GAL4arm.PS/armXM19.UAS.Tag:HA
arm2 is rescued by Scer\GAL4arm.PS/armUAS.cWa
arm2 is partially rescued by Scer\GAL4da.G32/armUAS.Tag:M(sev)
arm2 is partially rescued by armUAS.Tag:MYC,Tag:NLS(SV40-largeT)/Scer\GAL4e22c
arm2 is partially rescued by armUAS.Tag:MYC,Tag:NES(oPKI)/Scer\GAL4e22c
arm2 is partially rescued by Scer\GAL4e22c/armR.UAS.Tag:MYC
arm2 is partially rescued by armTag:MYC,Tag:PM(hKRAS)
arm2 is partially rescued by armR.UAS/Scer\GAL4e22c
arm2 is partially rescued by armNR.UAS.Tag:MYC/Scer\GAL4e22c
arm2 is partially rescued by Scer\GAL4e22c/armS2.UAS.Tag:MYC
arm2 is partially rescued by Scer\GAL4arm.PS/armΔC.UAS
arm2 is not rescued by Scer\GAL4e22c/armUAS.Tag:MYC,Tag:TM(xNcad)
arm2 is not rescued by Scer\GAL4e22c/armUAS.Tag:MYC,Tag:TM(xNcad)
The "lawn of denticles" cuticle phenotype seen in arm2 embryos is substantially rescued by ubiquitous expression of armScer\UAS.T:sev-TM using Scer\GAL4da.G32 (stripes of naked cuticle are restored). Ubiquitous expression of armS10.Scer\UAS.T:Hsap\MYC in embryos using Scer\GAL4da.G32 produces ectopic naked cuticle in the arm2 background.
The segment polarity phenotype of embryos maternally and zygotically mutant for arm2 is substantially rescued by armScer\UAS.T:Hsap\MYC,T:Ocun\nes or armScer\UAS.T:Hsap\MYC,T:SV40\nls2 expressed under the control of Scer\GAL4e22c.
Homozygous clones in the eye that are weakly rescued with armBCD7 may show ectopic differentiation of retinal tissue. Many clones are associated with polarity inversions; the clones frequently show polarity inversions on their equatorial side. The polarity inversions are usually contained within the clone, but clones in dorsal regions of the eye show clear non-autonomy, with up to two to four ommatidial rows distant from the clone showing chirality changes.
The segment polarity cuticle phenotype of embryos derived from homozygous female germline clones is rescued to wild-type by arm+mWa, when the transgene is provided maternally. The phenotype of these embryos is also rescued by armScer\UAS.cWa expressed under the control of Scer\GAL4arm.PS and partially rescued by armΔC.Scer\UAS expressed under the control of Scer\GAL4arm.PS.
Encodes a truncated protein that can still be phosphorylated.