A Database of Drosophila Genes & Genomes

FB2008_07, released August 8, 2008
 

Gene Dmel\ac

General Information
SymbolDmel\acSpeciesD. melanogaster
NameachaeteAnnotation symbolCG3796
Feature typeprotein_coding_geneFlyBase IDFBgn0000022
Created / Updated2003-12-01/2003-12-01
Genomic Location
Chromosome (arm)XRecombination map1-0.0
Cytogenetic map1A6-1A6Sequence locationX:264,064..265,024 [+]
Map ( GBrowse ) detailed view
hide Summary Information
Automatically generated summary

See sections below for more information
The gene achaete is referred to in FlyBase by the symbol ac (CG3796, FBgn0000022). It has the cytological map location 1A6. Its sequence location is X:264064..265024. Its molecular function is described as: specific RNA polymerase II transcription factor activity; DNA binding; transcription activator activity; transcription factor activity; transcription regulator activity. It is involved in the biological processes described with 11 unique terms, many of which group under: anatomical structure development; system development; regulation of biological process; regulation of metabolic process; nervous system development; central nervous system development; cell cycle; neuroblast fate commitment; organ development; multicellular organismal development; primary metabolic process; gamete generation; positive regulation of nucleobase, nucleoside, nucleotide and nucleic acid metabolic process. 44 alleles are reported. The phenotypes of these alleles are annotated with 37 unique terms, many of which group under: adult segment; peripheral nervous system; adult mesothoracic segment; nervous system; postalar bristle; anterior orbital bristle; embryonic nervous system; acrostichal bristle; antennal segment; adult external prothorax. It has one annotated transcript and one annotated polypeptide.

External Summaries
hide Phenotypic Description from the Red Book (Lindsley & Zimm 1992)
Gene/Allele symbols may differ from current usage
ac: achaete
thumb
ac: achaete
From Bridges and Brehme, 1944, Carnegie Inst. Washington Publ. No. 552: 12.
ac specifies the formation of the anterior and posterior dorsocentral, the posterior supra-alar (as does sc), the anterior vertical bristle, and in addition the acrostichal rows of microchaetae on the notum. Absence of bristles accompanied by absence of associated socket and underlying centrally projecting neuron (Stern, 1938, Genetics 23: 172-73). In addition mutant alleles of ac tend to remove the interocellar hairs and the hairs on the surface of the eye and a restricted subset of the campaniform sensilla on the wing blade (Leyns, Dambly-Chaudiere and Ghysen, 1989, Roux's Arch. Dev. Biol. 198: 227-32). Trichomes are not affected. ac deficiencies, e.g., In(1)y3PLsc8R, survive as fully mobile and fertile adults (Garcia-Bellido, 1979, Genetics 90: 491-529). A series of terminal deficiencies approaching the ac coding sequence from the left a few hundred base pairs at a time, when tested in heterozygotes with In(1)y3PLsc8R or Df(1)sc19, cause, with few exceptions, progressive loss of chaetae as the amount of deleted material increases; response of anterior verticals erratic. First effects of deficiencies noted with chromosomes broken 10 kb upstream of the transcription start site. Despite loss of most of the DNA upstream from the transcribed region, the phenotypes associated with these deletions still suppressed by emc and h (Ruiz-Gomez and Modolell, 1987, Genes Dev. 1: 1238-46). Deficiencies for ac act as suppressors of h (Sturtevant, 1970, Dev. Biol. 21: 48-63), whereas extra doses of ac+ enhance expression of h (Moscoso del Prado and Garcia-Bellido, 1984, Wilhelm Roux's Arch. Dev. Biol. 193: 242-51). Longitudinal stripes of expression on either side of the midline during gastrulation become internalized and segmented into four longitudinal rows of clusters of expressing cells at half-segment intervals. ac RNA undetectable in germ band at time of germ-band shortening. Several regions of high expression seen in cephalic region. Also expressed in posterior midgut rudiment (Romani, Campuzano, and Modolell, 1987, EMBO J. 6: 2085-92; Cabrera, Martinez-Arias, and Bate, 1987, Cell 50: 425-33). In third-instar larvae, expression in wing imaginal disks restricted to regions where precursors of cuticular organs specified by ac are known to reside (Romani, Campuzano, Macagno, and Modolell, 1989, Genes Dev. 3: 997-1007).
ac1
Hypomorphic; phenotype of homozygous females weaker than in hemizygous females (Garcia-Bellido, 1979, Genetics 91: 491-520). Posterior dorsocentral bristles missing; also posterior supra-alar and anterior vertical bristles frequently missing. Anterior dorsocentrals displaced anteriorly (Claxton, 1969, Genetics 63: 883-96). Garcia-Bellido (1979) finds anterior dorsocentral bristles more strongly decreased than posterior dorsocentrals. Hairs usually fewer near position of posterior dorsocentrals; interocellar hairs invariably fewer, typically absent. Eyes partly devoid of hairs. Trichomes unaffected. Limited nonautonomy near the borders of somatic spots with respect both to numbers and positions of bristles and hairs (Stern, 1954, Am. Sci. 42: 212-47; Roberts, 1961, Genetics 46: 1241-43; Claxton, 1976, Genet. Res. 27: 11-22). ac partially suppresses h; Hw/ac = Hw/+ (Sturtevant, 1969).
*ac2
Since ac2 and sc3 were for practical purposes inseparable by crossing over, the effect of ac2 alone could not be assessed. The double mutant removed all bristles except scutellars and postdorsocentrals. ac2/ac2 and ac2/+ suppress h (Sturtevant). Viability of males low; females nearly inviable. RK2.
ac3
Posterior and usually anterior dorsocentrals lacking; other bristles wild type. Hairs removed from areas across rear and front edges of thorax, through mid-dorsal area, and between ocelli. ac3 even in ac3/+ heterozygotes exerts strong suppression on h (Sturtevant, 1970, Dev. Biol. 21: 48-61). RK2A.
ac3B
Low level of absence of dorsocentral bristles as well as microchaetae. Bristles normally removed by sc mutations not missing.
Hw1
Males and heterozygous females have extra bristles on the head (especially occipitals), the notum and the mesopleurae; also extra bristles, including sensory ones and campaniform sensilla (Palka, Schubiger, and Hart, 1981, Nature 294: 447-49), along longitudinal veins and in membrane of wing. Classifiable in a single dose in triploids (Schultz, 1934, DIS 1: 55). Homozygous females more extreme; 110 extra chaetae on wing vs. 49.5 for Hw1/+; 11 on scutellum and postnotum vs. 0.7 in Hw/+ (Garcia-Bellido and Merriam, 1971, Proc. Nat. Acad. Sci. USA 68: 2222-26). Number of extra bristles inversely correlated with temperature (Ohn and Sheldon, 1970, Genetics 66: 517-40). Hw1/Hw1 females exhibit 40-80% wildtype viability and are agametic steriles; clones of homozygous germinal cells in Hw/+ females capable of producing progeny (Garcia-Bellido and Robbins, 1983, Genetics 103: 235-47); however, Garcia-Alonzo and Garcia-Bellido claim that their strain is no longer homozygous female sterile. Viability and fertility of Hw1/Y males and Hw1/+ females good. Hw1/Hw1 and _ autonomous in somatic clones until 8 hr before puparium formation; altering cellular genotype after that time is without effect owing to perdurance (Garcia-Bellido and Merriam). X-ray-induced full and partial revertants are frequently mutant for ac (Garcia-Alonzo and Garcia-Bellido). RK1 as male or heterozygous female.
Hw2
Females homozygous for Hw2 show only occasional extra hairs along wings. Overlaps wild type. RK3A.
Hw49c
More extreme than Hw1. Homozygous female has doubling and tripling of many bristles, three or four extra dorsocentral bristles per side, extra wing veins, gap in posterior crossvein, and extra hairs on vein L2 and in wing cells. Width of mesonotum in region between dorsocentral bristles increased leading to increased numbers of acrostichal rows as well as extraneous extra microchaetae (Gottlieb, 1964, Genetics 49: 739-60); many lack one or more ocellar or postvertical macrochaetae (Stoddard, 1972, DIS 48: 137-38). Heterozygous female has normal bristles, extra hairs on L2 and L3 and in wing cells, and often an extra free vein from posterior crossvein; also extra acrostichal rows. Hw49c male much like homozygous female but bristle duplication less extreme. Low degree of non autonomy reported at junction between Hw49c/Hw49c and +/+ twin spots (Gottlieb). Male and heterozygous female fertile; homozygous female sterile. Revertants of Hw49c lose their dominant phenotypes; however they remain sc and may exhibit a weak ac phenotype or be lethal in combination with Df(1)sc19 (Garcia-Alonzo and Garcia-Bellido). Not suppressed by su(Hw). Hw49c and Oce act synergistically in removing head bristles but cancel each others effects on thorax in Hw/Oce females (Stoddard). ac, sc, and l(1)sc transcripts considerably more abundant than in wild type; also more generally expressed in wing disks than normal (Balcells et al.). RK1.
Hw685
Df(1)Hw685/Df(1)sc19 generates lateral clusters of microchaetae on the scutellum and promotes differentiation of extra sensilla campaniformia on the dorsal radius of the wing, of microchaetae or other sensilla on wing vein 3, and occasional microchaetae on wing vein 2. Slight increases in numbers of microchaetae on notum as well. Displays a very weak achaete effect despite presumed homozygous deficiency for ac.
Hwbap: Hairy wing-bristly abdominal pleura
Nearly all abdominal segments have on the pleurae two rows of bristles, which are the same size as those on the sternites. Mutant-bearing flies have a row of bristles arising immediately posterior to each pigment band that are shorter than other tergite bristles.
HwBS
Spontaneous derivation of Hw1 with slightly weaker phenotype.
Hw: Hairy wing
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Hw: Hairy wing
Edith M. Wallace, unpublished.
Gain of function alleles of ASC, which lead to the development of supernumerary bristles and hairs in all segments of the fly: in the prefrons, postfrons, postgena, and occipital regions of the head; in the preepisternum, episternum, anepisternum, scutum, scutellum, postnotum, wingblade, legs, humerus, and halteres of the thorax; and in the tergites, pleura, and sternites of the abdomen. Phenotype suppressed by three doses of h+ (Botas, Moscoso del Prado, and Garcia-Bellido, 1982, EMBO J. 1: 307-10) and enhanced by h, emc, and pyd (Neel, 1941, Genetics 26: 52-58; Moscoso del Prado and Garcia-Bellido, 1984, Wilhelm Roux's Arch Dev. Biol. 193: 242-45). Numbers of super numerary bristles reduced in da+ hemizygotes (Dambly-Chaudiere, Ghysen, Jan and Jan, 1988, Roux's Arch Dev. Biol. 97: 419-23).
hide Detailed Mapping Data
FlyBase Computed Cytological Location
Cytogenetic map
Evidence for location
1A6-1A6  
Limits computationally determined from genome sequence between P{EP}CG17896EP1320&P{EP}EP1398 and P{EP}svrEP356&P{EP}argEP452  
Experimentally Determined Cytological Location
Cytogenetic map
Notes
References
1B1-1B5
(determined by in situ hybridisation)  
Experimentally Determined Recombination Data
Location
1-0.0
 
Left of (cM)
Right of (cM)
Notes
Molecular Map Data
Gene Order (in direction of increasing cytology)
References
Gene Order (overall orientation not stated)
References
Overall orientation not stated: y? anon-1Be? ac?
hide Gene Model & Products
Please see the GBrowse view of Dmel\ac for information on other features
detailed view FBtr0070072 FBtr0273443 FBtr0273442 FBpp0070071
Comments on Gene Model
hide Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Associated CDS (aa)
FBtr0070072
  961
  201
Additional Transcript Data & Comments
Reported size (kB)
1.1, 0.9 (northern blot)
Comments
External Data
Crossreferences
hide Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kD)
Length (aa)
Theoretical pI
RefSeq ID
GenBank protein
ac-PA  
FBpp0070071  
22.8  
201  
7.72  
Additional Polypeptide Data & Comments
Reported size (kD)
23 (kD predicted)
Comments
External Data
Linkouts
PANTHER - Protein classification by function, families, and pathways
Crossreferences
InterPro domains - A database of protein families, domains, and functional sites
TRANSFAC - Eukaryotic transcription factors, their genomic binding sites, and DNA-binding profiles
  • R03719
  • R04159
  • T00005
hide Sequences Consistent with the Gene Model
DDBJ /
EMBL /
GenBank
DNA sequence
Protein sequence
Name
 
UniProtKB/Swiss-Prot
UniProtKB/TrEMBL
    Maps to
    Does NOT map to
    Identified with
    hide Mapped Features & Mutations
    Please see GBrowse or insertion reports for information on insertions of transgenic constructs and features not listed here
    Type
    Symbol & Location
    Additional Notes
    References
    aberration junction
    In(1)Hw[1+R1].bk1
    X:261,107..262,725
    comment=Aberration breakpoint mapped to a BglII-BglII restriction fragment; position of restriction fragment on reference sequence inferred by FlyBase curator.
    evidence=experimental
    linked_to=BglII-BglII_rfrag
    protein binding site
    ac-protein_bind-1
    X:263,752..263,769
    bound_moiety=E(spl)-XP
    evidence=experimental
    bound_moiety=HLHm5-XP
    regulatory region
    ac-reg_element-2
    X:263,243..263,250
    comment=E box T5E4
    evidence=experimental
    regulatory region
    ac-reg_element-3
    X:263,759..263,768
    comment=bound by h protein and HLHm7 protein
    comment=h/E-1 site
    evidence=experimental
    regulatory region
    ac-reg_element-4
    X:263,798..263,805
    comment=E box T5E3
    comment=Bound by heterodimers consisting of da protein and either ac protein, sc protein or l(1)sc protein. Important for tissue-specific expression.
    evidence=experimental
    regulatory region
    ac-reg_element-5
    X:263,866..263,873
    comment=E box T5E2
    comment=Bound by heterodimers consisting of da protein and either ac protein, sc protein or l(1)sc protein. Important for tissue-specific expression.
    evidence=experimental
    regulatory region
    ac-reg_element-6
    X:264,002..264,009
    comment=E box T5E1
    comment=Bound by heterodimers consisting of da protein and either ac protein, sc protein or l(1)sc protein. Important for tissue-specific expression.
    evidence=experimental
    hide External Data
    Linkouts
    DEDB - Drosophila exon database: splicing graphs
    Crossreferences
    EPD - Eukarytoic Promoter Database, an annotated collection of POL II promoters
    hide Expression Data
    FlyBase-Curated Data
    Transcript and
    Protein data
    Please see the FlyBase Gene Expression Report for details of gene expression from the literature.
    hide Summary of Transcript Expression
    Stage
    Tissue/Position
    Reference
     embryonic stage
     stomodeum
     embryonic stage
     neuroblast
     embryonic stage
     sensory organ mother cell
     embryonic stage
     posterior embryonic/larval midgut
     larval stage
     proneural cluster
     embryonic stage
     embryonic stomatogastric nervous system
     embryonic stage | stage 9
     embryonic stage
     posterior embryonic/larval midgut
     embryonic stage
     embryonic stage
     neurogenic region
     embryonic stage
     neurectoderm
     embryonic stage
     sensory organ cell
     larval stage | third instar
     dorsal mesothoracic disc | restricted
     embryonic stage
     embryonic stage
     ectoderm
     embryonic stage
     procephalon
     embryonic stage
     larval optic lobe | presumptive
     embryonic stage
     procephalic neuroblasts
     larval stage | third instar
     sensillum precursor
     embryonic stage
     embryonic central nervous system
     larval stage
     dorsal mesothoracic disc
     embryonic stage
     neurectoderm
     embryonic stage
     neurogenic region
     embryonic stage | stage 8
     embryonic stage
     neurectoderm
     embryonic stage
     cephalic furrow
     embryonic stage
     embryonic peripheral nervous system
     embryonic stage
     labral segment
     embryonic stage
     neurectoderm
     embryonic stage
     neurectoderm
    Marker for
      Subcellular Localization
      CV Term
      hide Summary of Polypeptide Expression
      Stage
      Tissue/Position
      Reference
       larval stage | third instar
       dorsal mesothoracic disc
       larval stage
       dorsal mesothoracic disc
       larval stage | third instar
       sensory organ mother cell
       embryonic stage | stage 9-11
       protocerebral neuroblast | subset
       embryonic stage | stage 8-9
       neuroblast NB3-5
       embryonic stage
       neurectoderm
       larval stage | third instar
       proneural cluster
       embryonic stage
       neurectoderm
       embryonic stage | stage 8-9
       neuroblast NB7-4
       larval stage
       proneural cluster
       larval stage | third instar
       wing vein L5
       embryonic stage | stage 8
       embryonic stage | stage 9-11
       deuterocerebral neuroblast | subset
       embryonic stage | stage 8-9
       neuroblast NB7-1
       larval stage | third instar
       embryonic stage | stage 8-10
       neuroblast MP2
       embryonic stage | stage 8-11
       procephalic neuroblast | subset
       larval stage | third instar
       wing vein L1
       embryonic stage
       neurectoderm
       larval stage | third instar
       wing vein L3
       embryonic stage | stage 8-11
       procephalic neurectoderm | restricted
       embryonic stage | stage 9
       embryonic stage
       neurectoderm
       embryonic stage
       neurectoderm
      Marker for
      Subcellular Localization
      CV Term
      hide External Data & Images
      Linkouts
      FLIGHT - Cell culture data for RNAi and other high-throughput technologies
      FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
      GEO (NCBI) - Gene expression data: microarray and other high-throughput technologies
      FlyExpress - Embryonic expression images (BDGP data)
      hide Alleles & Phenotypes
      hide Summary of Allele Phenotypes
      Lethality
      Allele
      Other Phenotypes
      Allele
      Sterility
      Allele
      Phenotype manifest in
      Allele
      macrochaeta & leg
      microchaeta & leg
      adult thorax & microchaeta
      wing & nerve
      mesothoracic tergum & macrochaeta | ectopic
      microchaeta & wing
      microchaeta & mesothoracic tergum | supernumerary
      sensory mother cell & dorsal mesothoracic disc
      microchaeta & scutum
      microchaeta & scutellum
      sense organ & wing vein
      macrochaeta & abdominal tergite
      microchaeta & pleural membrane
      microchaeta & mesothoracic pleurum
      hide Classical Alleles ( 25 )
      For All Classical Alleles Show

      Allele of acClassMutagenStocksKnown lesion
      ac+
        2 --
        ac1hypomorph32 Yes
        ac260-280 --
        ac260-31
          0 --
          ac20 --
          ac3amorph0 Yes
          ac3B0 Yes
          ac41 --
          ac4G0 Yes
          ac54e0 --
          acHw-1+R10 Yes
          acHw-1+R30 Yes
          acHw-1+R50 Yes
          acHw-1gain of function15 Yes
          acHw-21 --
          acHw-49c2 Yes
          acHw-49crv10 Yes
          acHw-49crv40 Yes
          acHw-685
            0 --
            acHw-BS0 Yes
            acHw-bap
              0 --
              accamiamorph0 Yes
              acrv10 Yes
              acsbm0 Yes
              acunspecified
                0 --
                hide Alleles Carried on Transgenic Constructs ( 19 )
                For All Alleles Carried on Transgenic Constructs Show

                Allele of acClassMutagenStocksKnown lesion
                ac+mPa0 Yes
                ac0.27.cvDa0 Yes
                ac0.27X123.cvDa0 Yes
                ac0.9.cvDa0 Yes
                ac0.9X123.cvDa0 Yes