FB2026_02 , released June 18, 2026
Recombinant Construct: P{Ir25a-GAL4.A}
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General Information
Symbol
P{Ir25a-GAL4.A}
FlyBase ID
FBtp0057158
Feature type
transgenic_transposable_element
Component Allele(s)
Scer\GAL4Ir25a.PA
Also Known As
IR25a-gal4
Size
Expression Data
GAL4 reporter/driver
Associated insertion(s)
2 available
Molecular map
Description and Uses
Construct components
Component allele Scer\GAL4Ir25a.PA
Transgenic product class
Component
Use(s)
Regulatory region(s)
Ir25a
Ir25a_651bp
Encoded product / tool
GAL4
Description

Ir25a promoter sequences regulate expression of a GAL4 driver.

(Abuin et al., 2011)
Sequence Data
Sequence (FB)
Associated Sequence Data
DDBJ / EMBL / GenBank
DNA Sequence
Extent
Segments and Size
Total Size
Left end
Right end
 
Segments
Num
Orientation
Symbol
Reference
Phenotypic Data
Expression Data
Reporter Expression
distribution deduced from reporter (Gal4 UAS)
Stage
Tissue/Position (including subcellular localization)
Reference
third instar larval stage
terminal organ ganglion
(Omelchenko et al., 2022)
ventral organ ganglion
(Omelchenko et al., 2022)
dorsal organ ganglion
(Omelchenko et al., 2022)
dorsopharyngeal organ
(Omelchenko et al., 2022)
posterior pharyngeal sense organ
(Omelchenko et al., 2022)
dorsal pharyngeal sense organ
(Omelchenko et al., 2022)
ventral pharyngeal sense organ
(Omelchenko et al., 2022)
adult stage
neuron of antennal coeloconic sensillum ac1
(Silbering et al., 2011)
neuron of antennal coeloconic sensillum ac2
(Silbering et al., 2011)
neuron of antennal coeloconic sensillum ac3
(Silbering et al., 2011)
neuron of antennal coeloconic sensillum ac4
(Silbering et al., 2011)
neuron of sensillum of sacculus chamber I
(Silbering et al., 2011)
neuron of sensillum of sacculus chamber II
(Silbering et al., 2011)
neuron of aristal sensillum
(Enjin et al., 2016, Silbering et al., 2011)
adult antennal lobe glomerulus | subset
(Silbering et al., 2011)
gustatory receptor neuron of the labellum | subset
(Lee et al., 2018)
gustatory receptor neuron of leg
(Lee et al., 2018)
calcium-sensing neuron of labellar S-type taste bristle
(Lee et al., 2018)
metathoracic leg taste bristle chemosensory neuron | subset
(Sánchez-Alcañiz et al., 2018)
labral sense organ neuron
(Sánchez-Alcañiz et al., 2018)
gustatory receptor neuron of labellar taste bristle
(Sánchez-Alcañiz et al., 2018)
adult antennal olfactory receptor neuron | subset
(Sánchez-Alcañiz et al., 2018)
adult hygrosensory neuron Ir40a VP4
(Sun et al., 2018)
chamber II of sacculus
(Sun et al., 2018)
prothoracic leg taste bristle chemosensory neuron
(Ahn et al., 2017)
bitter-sensing neuron of the leg
(Ahn et al., 2017)
gustatory receptor neuron of the labellum
(Ahn et al., 2017)
mechanosensory neuron of femoral chordotonal organ | subset
(Chen et al., 2015)
Johnston organ neuron | subset
(Chen et al., 2015)
non-aristal sensory neuron VP3
(Alpert et al., 2020)
adult thermosensory neuron
(Enjin et al., 2016)
adult hygrosensory neuron Ir40a
(Enjin et al., 2016)
sensillum of sacculus chamber I
(Enjin et al., 2016)
sensillum of sacculus chamber II
(Enjin et al., 2016)
neuron of chamber I of sacculus
(Enjin et al., 2016)
neuron of chamber II of sacculus
(Enjin et al., 2016)
adult thermosensory neuron of arista
(Enjin et al., 2016)
Additional Information
Statement
Reference

ScerGAL4Ir25a.PA drives expression in many larval anterior chemosensory organs, including the terminal organ ganglion (TOG), ventral organ ganglion (VOG), dorsal organ ganglion (DOG), dorsopharyngeal organ (DPO), hypopharyngeal organ (posterior pharyngeal sensilla, PPS), epiphysis (dorsal pharyngeal sensilla, DPS), and hypophysis (ventral pharyngeal sensilla, VPS).

(Omelchenko et al., 2022)

ScerGAL4Ir25a.PA drives expression in the gustatory receptor neurons of the labellum that overlaps extensively with that of Ir25a, and with gustatory receptor neurons in the leg that are positive for ScerGAL4Ir76b.1.5.

(Lee et al., 2018)

This GAL4 line drives expression in hygrosensitive neurons in the second chamber of the sacculus.

(Sun et al., 2018)

Expression is observed in multiple gustatory receptor neurons per sensillum. In the tarsal sensilla, expression largely overlaps and includes sweet and bitter gustatory receptor neurons. Expression also occurs in multiple neurons per sensillum in the labial palps.

(Ahn et al., 2017)

Drives expression in a subset of bitter-sensing, hygrosensory, and cold-sensing thermosensory neurons in the labellum, legs, arista, sacculus, antenna, labrum, and larval head sensory organs

(FlyBase Curators, 2017)

ScerGAL4Ir25a.PA drives expression in thermosensory neurons of the arista, and in hygrosensory neurons in sacculus chambers I, II and III.

(Enjin et al., 2016)

ScerGAL4Ir25a.PA drives expression in a subset of neurons of the femoral chordotonal organs and Johnston organ. These neurons coexpress NcraQFnompC.PP.

(Chen et al., 2015)

ScerGAL4Ir25a.PA is expressed in the neurons that innervate the antennal coeloconic sensillum ac1-a4, basiconic and blunt-tipped sensillum of sacculus, aristal sensillum and in a subset of antennal lobe glomeruli.

(Silbering et al., 2011)
 
Marker for
Reflects expression of
Ir25a
(Alpert et al., 2020, Lee et al., 2018, Sun et al., 2018, Ahn et al., 2017, Enjin et al., 2016, Chen et al., 2015, Silbering et al., 2011)
Reporter construct used in assay
Progenitors and Descendants
progenitor(s)
descendant(s)
Comments
Stocks (1)
Stocks containing insertion(s) of this recombinant construct
Bloomington
41728
w*; P{Ir25a-GAL4.A}236.1; TM2/TM6B, Tb1
External Crossreferences and Linkouts ( 0 )
Synonyms and Secondary IDs (8)
References (31)