Skip Header

 
Contribute Send feedback

Reviewed, UniProtKB/Swiss-Prot Q8IN81 (FRU_DROME)

Last modified July 22, 2008. Version 59. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (4) | Third-party data | Customize display text xml rdf/xml gff fasta
Names and origin · Protein attributes · General annotation (Comments) · Ontologies · Binary interactions · Alternative products · Sequence annotation (Features) · Sequences · References · Cross-references · Entry information · Relevant documents

Names and origin

Protein namesRecommended name:
    Sex determination protein fruitless
Gene names
Name: fru
Synonyms: BTB-VI
ORF Names: CG14307
OrganismDrosophila melanogaster (Fruit fly) [Complete proteome]
Taxonomic identifier7227 [NCBI]
Taxonomic lineageEukaryotaMetazoaArthropodaHexapodaInsectaPterygotaNeopteraEndopterygotaDipteraBrachyceraMuscomorphaEphydroideaDrosophilidaeDrosophilaSophophora

Protein attributes

Sequence length955 AA.
Sequence statusComplete.
Sequence processingThe displayed sequence is not processed.
Protein existenceEvidence at protein level.

General annotation (Comments)

Function

Probably acts as a transcriptional regulator. Part of the somatic sex determination hierarchy; sex determination genes transformer (tra) and transformer-2 (tra-2) switch fru splicing from the male-specific pattern to the female-specific pattern through activation of the female-specific fru 5'-splice site. Vital for the development of males and females. Controls the development of the male specific abdominal muscle of Lawrence. Plays a role in male courtship behavior and sexual orientation. Enhances male-specific expression of takeout in brain-associated fat body.

Subcellular location

NucleusPotential.

Tissue specificity

Expressed in parts of the adult male brain associated with the courtship song and steps of the male courtship. Also expressed in the larval and pupal male mushroom body and optic lobe. Expressed in pupal female optic lobe.

Miscellaneous

Mutant males exhibit bisexual behavior; they court females but are behaviorally sterile so fail to mate and they exhibit vigorous courtship with other fru mutant males.

Sequence similarities

Contains 1 BTB (POZ) domain.

Contains 1 C2H2-type zinc finger.

Binary interactions

With

Entry

#Exp.

IntAct

Notes

CG10323Q9V4B81EBI-196831,EBI-145217

Alternative products

This entry describes 10 isoforms produced by alternative splicing. [Align] [Select]

Notes: Sex specific splicing is controlled by tra and tra-2. Sex-specific repression of the translation of fru mRNA might be mediated by the binding of Tra to the fru mRNA in females.
Isoform Male-A (identifier: Q8IN81-1)

Also known as: E;

This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.
Isoform Female-A (identifier: Q8IN81-4)

Also known as: C;

The sequence of this isoform differs from the canonical sequence as follows:
     1-101: Missing.
Isoform Female-B (identifier: Q8IN81-7)

Also known as: F;

The sequence of this isoform differs from the canonical sequence as follows:
     1-101: Missing.
     617-789: RVKCFNIKHD...YHGHANHQLH → SSARHHLSTP...DRLLKLNSSI
     790-955: Missing.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical view
Sequence conflict6501T → A in AAG28589. Ref.3
Isoform Female-E (identifier: Q8IN81-10)

Also known as: H;

The sequence of this isoform differs from the canonical sequence as follows:
     1-101: Missing.
     617-796: RVKCFNIKHD...QLHQHPPSAT → SKAWHMRLTF...QQQQHNATSE
     797-955: Missing.
Isoform Female-I (identifier: Q8IN81-3)

The sequence of this isoform differs from the canonical sequence as follows:
     1-101: Missing.
     324-336: Missing.
     617-789: RVKCFNIKHD...YHGHANHQLH → SSARHHLSTP...DRLLKLNSSI
     790-955: Missing.
Isoform Male-B (identifier: Q8IN81-6)

Also known as: B;

The sequence of this isoform differs from the canonical sequence as follows:
     617-789: RVKCFNIKHD...YHGHANHQLH → SSARHHLSTP...DRLLKLNSSI
     790-955: Missing.
Isoform Male-E (identifier: Q8IN81-12)

Also known as: G;

The sequence of this isoform differs from the canonical sequence as follows:
     617-796: RVKCFNIKHD...QLHQHPPSAT → SKAWHMRLTF...QQQQHNATSE
     797-955: Missing.
Isoform Male-I (identifier: Q8IN81-2)

The sequence of this isoform differs from the canonical sequence as follows:
     324-336: Missing.
     617-789: RVKCFNIKHD...YHGHANHQLH → SSARHHLSTP...DRLLKLNSSI
     790-955: Missing.
Isoform Type-C (identifier: Q8IN81-8)

Also known as: D;

The sequence of this isoform differs from the canonical sequence as follows:
     1-101: Missing.
     572-766: SAALKLHAED...PPVANNQAYL → VKKSEAFLGS...ITINVGKNSA
     767-955: Missing.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical view
Sequence conflict5391S → P in AAG28590. Ref.3
Sequence conflict6171H → R in AAG28590. Ref.3
Isoform Type-D (identifier: Q8IN81-9)

Also known as: A;

The sequence of this isoform differs from the canonical sequence as follows:
     1-101: Missing.
     617-617: R → E
     618-955: Missing.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical view

Molecule processing

Chain1 – 955955Sex determination protein fruitless

Regions

Domain131 – 19666BTB
Zinc finger918 – 94124C2H2-type
Compositional bias34 – 5623His-rich
Compositional bias77 – 9317Pro-rich
Compositional bias292 – 35766Ala-rich
Compositional bias386 – 42641Asn-rich
Compositional bias799 – 87072Ala/Ser-rich

Natural variations

Alternative sequence1 – 101101Missing in isoform Female-I, isoform Female-A, isoform Type-D, isoform Type-C, isoform Female-B and isoform Female-E.
Alternative sequence324 – 33613Missing in isoform Female-I and isoform Male-I.
Alternative sequence572 – 766195SAALK…NQAYL → VKKSEAFLGSTGNKSMHQML LHQAVEAQLKSFQLHYQNEG LDSAMHRLLAQQQQHQEQQQ QHQQQPHHSLGKSQSPAIPS GSAGGSSRKSGRFRANWLYQ FEWLQYDERANTMFCRHCRK WSGELADIRTSFVEGNSNFR LEIVNHHNKCKSHRMCYERE LQEQQQHPMPSGSAGGSSKR RSPEIITINVGKNSA in isoform Type-C.
Alternative sequence617 – 796180RVKCF…PPSAT → SKAWHMRLTFERLSGGCNLH RCKLCGKVVTHIRNHYHVHF PGRFECPLCRATYTRSDNLR THCKFKHPMYNPDTRKFDNL MSSSAVGAAATPTASQLAVA SQAAMAAAAAAAFNAAQQQQ QQQQQQQQHQHQQQQQHQQS QQQQQQQQQSQQQLHALAQQ HMLQLQPQHHQQQQHNATSE in isoform Female-E and isoform Male-E.
Alternative sequence617 – 789173RVKCF…NHQLH → SSARHHLSTPLSTSSSASPP PPPFGMHLSAALKREYHPLH YMAAGNGHNGPSALGYGNQG SGNAPNSAGGAGSVAGGVGA GGGAGGATGAAGHNSHHTMS YHNMFTPSRDPGTMWRCRSC GKEVTNRWHHFHSHTAQRSM CPYCPATYSRIDTLRSHLRV KHPDRLLKLNSSI in isoform Female-I, isoform Male-I, isoform Female-B and isoform Male-B.
Alternative sequence6171R → E in isoform Type-D.
Alternative sequence618 – 955338Missing in isoform Type-D.
Alternative sequence767 – 955189Missing in isoform Type-C.
Alternative sequence790 – 955166Missing in isoform Female-I, isoform Male-I, isoform Female-B and isoform Male-B.
Alternative sequence797 – 955159Missing in isoform Female-E and isoform Male-E.

Experimental info

Sequence conflict1071C → S in AAA50838. Ref.6
Sequence conflict1311C → R in BAA12664. Ref.3
Sequence conflict212 – 2187RGLTDNN → CANQGSI in AAA50838. Ref.6
Sequence conflict722 – 7232RA → QRN Ref.2 Ref.3

Sequences

Sequence LengthMass (Da)Tools
Isoform Male-A (E) [UniParc].

Last modified March 1, 2003. Version 1.
Checksum: E2A6005D5A7FB7B7

FASTA955102,880
        10         20         30         40         50         60 
MMATSQDYFG NPYALFRGPP TTLRPRESPL GVGHPHGHGH LHSHAHAHGH GHAHSHYAAL 

        70         80         90        100        110        120 
DLQTPHKRNI ETDVRAPPPP LPPPPLPLPP ASPRYNTDQG AMDQQFCLRW NNHPTNLTGV 

       130        140        150        160        170        180 
LTSLLQREAL CDVTLACEGE TVKAHQTILS ACSPYFETIF LQNQHPHPII YLKDVRYSEM 

       190        200        210        220        230        240 
RSLLDFMYKG EVNVGQSSLP MFLKTAESLQ VRGLTDNNNL NYRSDCDKLR DSAASSPTGR 

       250        260        270        280        290        300 
GPSNYTGGLG GAGGVADAMR ESRDSLRSRC ERDLRDELTQ RSSSSMSERS SAAAAAAAAA 

       310        320        330        340        350        360 
AAVAAAGGNV NAAAVALGLT TPTGGERSPS VGSASAAAAA AAVAAAVAAA ANRSASADGC 

       370        380        390        400        410        420 
SDRGSERGTL ERTDSRDDLL QLDYSNKDNN NSNSSSTGGN NNNNNNNNNN SSSNNNNSSS 

       430        440        450        460        470        480 
NRERNNSGER ERERERERER DRDRELSTTP VEQLSSSKRR RKNSSSNCDN SLSSSHQDRH 

       490        500        510        520        530        540 
YPQDSQANFK SSPVPKTGGS TSESEDAGGR HDSPLSMTTS VHLGGGGGNV GAASALSGLS 

       550        560        570        580        590        600 
QSLSIKQELM DAQQQQQHRE HHVALPPDYL PSAALKLHAE DMSTLLTQHA LQAADARDEH 

       610        620        630        640        650        660 
NDAKQLQLDQ TDNIDGRVKC FNIKHDRHPD RELDRNHREH DDDPGVIEEV VVDHVREMEA 

       670        680        690        700        710        720 
GNEHDPEEMK EAAYHATPPK YRRAVVYAPP HPDEEAASGS GSDIYVDGGY NCEYKCKELN 

       730        740        750        760        770        780 
MRAIRCSRQQ HMMSHYSPHH PHHRSLIDCP AEAAYSPPVA NNQAYLASNG AVQQLDLSTY 

       790        800        810        820        830        840 
HGHANHQLHQ HPPSATHPSH SQSSPHYPSA SGAGAGAGSV SVSIAGSASG SATSAPASVA 

       850        860        870        880        890        900 
TSAVSPQPSS SSTGSTSSAA AVAAAAAAAA NRRDHNIDYS TLFVQLSGTL PTLYRCVSCN 

       910        920        930        940        950 
KIVSNRWHHA NIHRPQSHEC PVCGQKFTRR DNMKAHCKIK HADIKDRFFS HYVHM 

« Hide

Isoform Female-A (C) [UniParc].

Checksum: 3586E2B2CD274996
Show »

85491,936
Isoform Female-B (F) [UniParc].

Checksum: 66338CF48C6BF42C
Show »

68873,094
Isoform Female-E (H) [UniParc].

Checksum: 28B9F9BD279B2DB1
Show »

69575,537
Isoform Female-I [UniParc].

Checksum: E4772F505C0B0577
Show »

67571,950
Isoform Male-B (B) [UniParc].

Checksum: 7F87220F6C723A29
Show »

78984,038
Isoform Male-E (G) [UniParc].

Checksum: DB9F4F6F30170AD8
Show »

79686,481
Isoform Male-I [UniParc].

Checksum: BE4560B1E0DF6297
Show »

77682,895
Isoform Type-C (D) [UniParc].

Checksum: 2235D16063D4444C
Show »

66572,365
Isoform Type-D (A) [UniParc].

Checksum: E91B5D22099FF65B
Show »

51655,086

References

« Hide 'large scale' references
[1]"Control of male sexual behavior and sexual orientation in Drosophila by the fruitless gene."
Ryner L.C., Goodwin S.F., Castrillon D.H., Anand A., Villella A., Baker B.S., Hall J.C., Taylor B.J., Wasserman S.A.
Cell 87:1079-1089(1996) [PubMed: 8978612] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORMS MALE-I AND FEMALE-I), FUNCTION, TISSUE SPECIFICITY, INTERACTION WITH TRA.
Strain: Oregon-R.
[2]"Sexual orientation in Drosophila is altered by the satori mutation in the sex-determination gene fruitless that encodes a zinc finger protein with a BTB domain."
Ito H., Fujitani K., Usui K., Shimizu-Nishikawa K., Tanaka S., Yamamoto D.
Proc. Natl. Acad. Sci. U.S.A. 93:9687-9692(1996) [PubMed: 8790392] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM FEMALE-A), FUNCTION, TISSUE SPECIFICITY.
Strain: Canton-S.
Tissue: Head.
[3]"Formation of the male-specific muscle in female Drosophila by ectopic fruitless expression."
Usui-Aoki K., Ito H., Ui-Tei K., Takahashi K., Lukacsovich T., Awano W., Nakata H., Piao Z.F., Nilsson E.E., Tomida J.-Y., Yamamoto D.
Nat. Cell Biol. 2:500-506(2000) [PubMed: 10934470] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORMS MALE-A; FEMALE-A; MALE-B; FEMALE-B; TYPE-C; TYPE-D; MALE-E AND FEMALE-E), FUNCTION, TISSUE SPECIFICITY, INTERACTION WITH TRA.
Strain: Canton-S.
Tissue: Head.
[4]"The genome sequence of Drosophila melanogaster."
Adams M.D., Celniker S.E., Holt R.A., Evans C.A., Gocayne J.D., Amanatides P.G., Scherer S.E., Li P.W., Hoskins R.A., Galle R.F., George R.A., Lewis S.E., Richards S., Ashburner M., Henderson S.N., Sutton G.G., Wortman J.R., Yandell M.D. expand/collapse author list , Zhang Q., Chen L.X., Brandon R.C., Rogers Y.-H.C., Blazej R.G., Champe M., Pfeiffer B.D., Wan K.H., Doyle C., Baxter E.G., Helt G., Nelson C.R., Miklos G.L.G., Abril J.F., Agbayani A., An H.-J., Andrews-Pfannkoch C., Baldwin D., Ballew R.M., Basu A., Baxendale J., Bayraktaroglu L., Beasley E.M., Beeson K.Y., Benos P.V., Berman B.P., Bhandari D., Bolshakov S., Borkova D., Botchan M.R., Bouck J., Brokstein P., Brottier P., Burtis K.C., Busam D.A., Butler H., Cadieu E., Center A., Chandra I., Cherry J.M., Cawley S., Dahlke C., Davenport L.B., Davies P., de Pablos B., Delcher A., Deng Z., Mays A.D., Dew I., Dietz S.M., Dodson K., Doup L.E., Downes M., Dugan-Rocha S., Dunkov B.C., Dunn P., Durbin K.J., Evangelista C.C., Ferraz C., Ferriera S., Fleischmann W., Fosler C., Gabrielian A.E., Garg N.S., Gelbart W.M., Glasser K., Glodek A., Gong F., Gorrell J.H., Gu Z., Guan P., Harris M., Harris N.L., Harvey D.A., Heim