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3sxl

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Revision as of 14:21, 5 August 2016

SEX-LETHAL RNA RECOGNITION DOMAINS 1 AND 2 FROM DROSOPHILA MELANOGASTER

Structural highlights

3sxl is a 3 chain structure with sequence from Drome. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
NonStd Res:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[SXL_DROME] Sex determination switch protein which controls sexual development by sex-specific splicing. Regulates dosage compensation in females by suppressing hyperactivation of X-linked genes. Expression of the embryo-specific isoform is under the control of primary sex-determining signal, which depends on the ratio of X chromosomes relative to autosomes (X:A ratio). Expression occurs in 2X:2A cells, but not in X:2A cells. The X:A ratio seems to be signaled by the relative concentration of the X-linked transcription factors SIS-A and SIS-B. As a result, the embryo-specific product is expressed early only in female embryos and specifies female-adult specific splicing; in the male where it is not expressed, the default splicing gives rise to a truncated non-functional protein. The female-specific isoform specifies the splicing of its own transcript, thereby initiating a positive autoregulatory feedback loop leading to female development pathway. The female-specific isoform controls the sex-specific splicing of transformer (TRA); acts as a translational repressor for male-specific lethal-2 (MSL-2) and prevents male-less (MLE), MSL-1 and MSL-3 proteins from associating with the female X chromosome.^[1] ^[2] ^[3]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

By binding specific RNA transcripts, the Sex-lethal protein (SXL) governs sexual differentiation and dosage compensation in Drosophila melanogaster. To investigate the basis for RNA binding specificity, we determined the crystal structure of the tandem RNA recognition motifs (RRMs) of SXL. Both RRMs adopt the canonical RRM fold, and the 10-residue, interdomain linker shows significant disorder. In contrast to the previously determined structure of the two-RRM fragment of heterogeneous nuclear ribonucleoprotein Al, SXL displays no interdomain contacts between RRMs. These results suggest that the SXL RRMs are flexibly tethered in solution, and RNA binding restricts the orientation of RRMs. Therefore, the observed specificity for single-stranded, U-rich sequences does not arise from a predefined, rigid architecture of the isolated SXL RRMs.

Absence of interdomain contacts in the crystal structure of the RNA recognition motifs of Sex-lethal.,Crowder SM, Kanaar R, Rio DC, Alber T Proc Natl Acad Sci U S A. 1999 Apr 27;96(9):4892-7. PMID:10220389^[4]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Bell LR, Maine EM, Schedl P, Cline TW. Sex-lethal, a Drosophila sex determination switch gene, exhibits sex-specific RNA splicing and sequence similarity to RNA binding proteins. Cell. 1988 Dec 23;55(6):1037-46. PMID:3144435
↑ Samuels ME, Schedl P, Cline TW. The complex set of late transcripts from the Drosophila sex determination gene sex-lethal encodes multiple related polypeptides. Mol Cell Biol. 1991 Jul;11(7):3584-602. PMID:1710769
↑ Keyes LN, Cline TW, Schedl P. The primary sex determination signal of Drosophila acts at the level of transcription. Cell. 1992 Mar 6;68(5):933-43. PMID:1547493
↑ Crowder SM, Kanaar R, Rio DC, Alber T. Absence of interdomain contacts in the crystal structure of the RNA recognition motifs of Sex-lethal. Proc Natl Acad Sci U S A. 1999 Apr 27;96(9):4892-7. PMID:10220389

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3sxl"

@@ Line 1: / Line 1: @@
 ==SEX-LETHAL RNA RECOGNITION DOMAINS 1 AND 2 FROM DROSOPHILA MELANOGASTER==
 <StructureSection load='3sxl' size='340' side='right' caption='[[3sxl]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[3sxl]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Drosophila_melanogaster Drosophila melanogaster]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3SXL OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3SXL FirstGlance]. <br>
+<table><tr><td colspan='2'>[[3sxl]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Drome Drome]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3SXL OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3SXL FirstGlance]. <br>
 </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3sxl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3sxl OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3sxl RCSB], [http://www.ebi.ac.uk/pdbsum/3sxl PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3sxl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3sxl OCA], [http://pdbe.org/3sxl PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3sxl RCSB], [http://www.ebi.ac.uk/pdbsum/3sxl PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3sxl ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 16: / Line 17: @@
     <text>to colour the structure by Evolutionary Conservation</text>
   </jmolCheckbox>
-</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf].
+</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=3sxl ConSurf].
 <div style="clear:both"></div>
 <div style="background-color:#fffaf0;">
@@ Line 26: / Line 27: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 3sxl" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Drosophila melanogaster]]
+[[Category: Drome]]
 [[Category: Alber, T C]]
 [[Category: Crowder, S M]]

3sxl

From Proteopedia

Revision as of 14:21, 5 August 2016

SEX-LETHAL RNA RECOGNITION DOMAINS 1 AND 2 FROM DROSOPHILA MELANOGASTER

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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