A Database of Drosophila Genes & Genomes

FB2013_03, released May 7th, 2013
 

Allele Rnor\P2rx2Scer\UAS.cLa

General Information
SymbolRnor\P2rx2Scer\UAS.cLaSpeciesR. norvegicus
NameUAS construct of LimaFlyBase IDFBal0192973
Feature typealleleAssociated geneRnor\P2rx2
Allele class
Mutagenin vitro construct - regulatory fusion
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Description
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FB2013_03
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Scer\UAS sequences control expression controls expression of Rnor\P2rx2.
Carried in construct
Cytology
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Action-contingent photoactivation of Rnor\P2rx2 in flies expressing Rnor\P2rx2[Scer\UAS.cLa] under the control of Scer\GAL4[ple.PF] produces conditioned odour avoidance. No conditioned odour avoidance is produced when the Scer\GAL4[Ddc.HL9] driver is used instead of Scer\GAL4[ple.PF].
Males in which all the fru-expressing neurons have been photoactivated (the flies express Rnor\P2rx2[Scer\UAS.cLa] under the control of Scer\GAL4[fru-GAL4] and the Rnor\P2rx2 product is activated by release of DMNPE-caged ATP which is photolyzed by 100ms pulses of ultraviolet light) do show courtship behaviours, such as abdominal thrusting and unilateral wing vibrations, but only in a small fraction of 1.7% of all trials. However, if the ventral ganglion is isolated by physically severing the neck connectives, headless male torsos expressing Rnor\P2rx2[Scer\UAS.cLa] under the control of Scer\GAL4[fru-GAL4] sing readily and reliably when exposed to light; 46% of these animals show a song response. If the animals also carry Scer\GAL80[tsh-GAL80] (which represses Scer\GAL4[fru-GAL4] in the trunk but not in the descending neurons) then there is no song activity in response to photoactivation. The light-activated courtship songs of headless male torsos expressing Rnor\P2rx2[Scer\UAS.cLa] under the control of Scer\GAL4[fru-GAL4] are superficially indistinguishable from those of normal courting flies; one wing extends from the body at approximately a right angle and vibrates, and like in intact flies, the song is asymmetrical, with one wing or the other being relied on during repeated stimulation. The songs of these headless males have acoustic features of native courtship song, in particular, the presence of sine and pulse episodes. However, the pulse song of the headless males often lacks the metronomic precision and high-pulse repetition rates of courting flies. Recordings of these courtship songs substitute fully for the songs of courting males in an assay where the song is played back to fly pairs consisting of a wingless male (which cannot produce a courtship song) and a virgin female). Photoactivation of fru-expressing neurons in headless females expressing Rnor\P2rx2[Scer\UAS.cLa] under the control of Scer\GAL4[fru-GAL4] is able to elicit unilateral wing vibrations, but 4-fold higher photon does are needed on average to elicit a female "song" compared to headless males of the same genotype. Songs produced by these headless females are less cleanly structured than those of headless males, often lacking a stereotyped pulse waveform, sufficient dampening to limit pulses to three vibration cycles and stable sine frequencies below the approximately 220Hz flight oscillation. Spontaneous transitions to bilateral wing movements and high-intensity buzzing are common in the headless females. Recordings of these courtship songs do not substitute for the songs of courting males in an assay where the song is played back to fly pairs consisting of a wingless male (which cannot produce a courtship song) and a virgin female).
Development, behavior and viability of Rnor\P2rx2Scer\UAS.cLa; Scer\GAL4nrv2.PS animals appears normal. Rnor\P2rx2Scer\UAS.cLa; Scer\GAL4elav-C155 adults have subtle co-ordination defects. Rnor\P2rx2Scer\UAS.cLa; Scer\GAL4Cha.7.4 adults die young (mean survival time after eclosion = 2.58 +/- 1.34 days, n = 329). Perfusion of ATP (μM 100) induces full scale excitatory junction potentials (EJPs) in abdominal muscles 6 or 7 of Rnor\P2rx2Scer\UAS.cLa; Scer\GAL4Cha.7.4 wandering third instar larvae. These ATP induced EJPs are blocked by 200 nM tetrodotoxin, suggesting that they are action potential driven. In the absence of exogenous ATP these muscles show an increase in the frequency and amplitude of miniature EJPs compared to wild-type, but full scale EJPs are limited to occasional spontaneous bursts of activity. This response to ATP is not seen in the absence of Rnor\P2rx2Scer\UAS.cLa. Rnor\P2rx2Scer\UAS.cLa; Scer\GAL4shakB.lethal.4.1 adults which have had 40-70 mM DMNPE-ATP(*) microinjected into their CNS exhibit typical giant fibre mediated escape movements (leg extension, jumping, wing opening, and high-frequency wing flapping) following 82% of brief exposures to UV laser light (8 mWmm-2 for 150-250 ms). (* DMNPE-ATP is an ATP derivative from which free ATP can be release by exposure to 355 nm laser light.) This effect is not seen in Rnor\P2rx2Scer\UAS.cLa; Scer\GAL4c370 or Rnor\P2rx2Scer\UAS.cLa; Scer\GAL4c217 flies. Rnor\P2rx2Scer\UAS.cLa; Scer\GAL4c17 adults which have had 40-70 mM DMNPE-ATP(*) microinjected into their CNS exhibit typical giant fibre mediated escape movements (leg extension, jumping, wing opening, and high-frequency wing flapping) following 63% of brief exposures to UV laser light (8 mWmm-2 for 150-250 ms). (* DMNPE-ATP is an ATP derivative from which free ATP can be release by exposure to 355 nm laser light.) Rnor\P2rx2Scer\UAS.cLa; Scer\GAL4Cha.7.4 adults which have had 40-70 mM DMNPE-ATP(*) microinjected into their CNS undergo convulsions and paralysis on exposure to UV laser light. (* DMNPE-ATP is an ATP derivative from which free ATP can be release by exposure to 355 nm laser light.) Rnor\P2rx2Scer\UAS.cLa; Scer\GAL4ple.PF flies whose nervous system has been micro-injected with 40-70 mM DMNPE-ATP(*) undergo marked and characteristic changes in behavior when exposed to UV laser-light. No such responses of locomotor activity to light stimulation is seen in controls. In the majority of such flies there is an instant increase in motor activity lasting approximately 30-120 seconds: the frequency and duration of pausing is reduced but average speed during periods of activity is unchanged. In addition, the types of routes the flies elect to follow changes after stimulation: frequently crisscrossing the center of the field rather than preferring to stay close to the perimeter as prior to stimulation. Occasionally, stimulated flies move in tightly wound circles. A minority of flies (32%) exhibit high motor activity prior to stimulation. For these flies, photo-stimulation leads to a transient arrest of locomotor activity. (* DMNPE-ATP is an ATP derivative from which free ATP can be release by exposure to 355 nm laser light.)
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Photoactivation of fru-expressing neurons in headless females expressing Rnor\P2rx2[Scer\UAS.cLa] under the control of Scer\GAL4[fru-GAL4] in a fru[M]/fru[GAL4] background produces courtship songs with acoustic characteristics similar to those seen in headless males expressing Rnor\P2rx2[Scer\UAS.cLa] under the control of Scer\GAL4[fru-GAL4] in a fru[+] background. Recordings of these courtship songs substitute fully for the songs of courting males in an assay where the song is played back to fly pairs consisting of a wingless male (which cannot produce a courtship song) and a virgin female). Photoactivation of fru-expressing neurons in headless males expressing Rnor\P2rx2[Scer\UAS.cLa] under the control of Scer\GAL4[fru-GAL4] in a fru[F]/fru[GAL4] background produces courtship songs with sine and pulse songs, but the acoustic characteristics of these songs show broad bimodal distributions, with peaks near the typical male and female modes, suggesting that these animals represent a mixed population.
norpA7/norpA7 are blind and rarely fly. However, norpA7/norpA7 fails to suppress stimulation of the jump response, including flight behavior, by UV in Rnor\P2rx2Scer\UAS.cLa adults carrying Scer\GAL4c17 or Scer\GAL4shakB.lethal.4.1 which have had 40-70 mM DMNPE-ATP(*) microinjected into their CNS.
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Reported As
Symbol Synonym
Rnor\P2rx2Scer\UAS.cLa
 
Name Synonym
UAS construct of Lima
 
Secondary FlyBase IDs
hide References ( 3 )
Research paper
Claridge-Chang et al., 2009, Cell 139(2): 405--415
Writing memories with light-addressable reinforcement circuitry. [FBrf0208958]
Clyne and Miesenbock, 2008, Cell 133(2): 354--363
Sex-specific control and tuning of the pattern generator for courtship song in Drosophila. [FBrf0204626]
Lima and Miesenbock, 2005, Cell 121(1): 141--152
Remote control of behavior through genetically targeted photostimulation of neurons. [FBrf0187231]