3bc1

From Proteopedia

(Difference between revisions)

Revision as of 20:14, 24 December 2014

Crystal Structure of the complex Rab27a-Slp2a

Structural highlights

3bc1 is a 4 chain structure with sequence from Homo sapiens and Mus musculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	2if0, 2iey, 2iez
Activity:	Small monomeric GTPase, with EC number 3.6.5.2
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[RB27A_MOUSE] Plays a role in cytotoxic granule exocytosis in lymphocytes. Required for both granule maturation and granule docking and priming at the immunologic synapse (By similarity). [SYTL2_HUMAN] Isoform 1 acts as a RAB27A effector protein and plays a role in cytotoxic granule exocytosis in lymphocytes. It is required for cytotoxic granule docking at the immunologic synapse. Isoform 4 binds phosphatidylserine (PS) and phosphatidylinositol-4,5-bisphosphate (PIP2) and promotes the recruitment of glucagon-containing granules to the cell membrane in pancreatic alpha cells. Binding to PS is inhibited by Ca(2+) while binding to PIP2 is Ca(2+) insensitive.^[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

Rab GTPases coordinate vesicular trafficking within eukaryotic cells by collaborating with a set of effector proteins. Rab27a regulates numerous exocytotic pathways, and its dysfunction causes the Griscelli syndrome human immunodeficiency. Exophilin4/Slp2-a localizes on phosphatidylserine-enriched plasma membrane, and its N-terminal Rab27-binding domain (RBD27) specifically recognizes Rab27 on the surfaces of melanosomes and secretory granules prior to docking and fusion. To characterize the selective binding of Rab27 to 11 various effectors, we have determined the 1.8 A resolution structure of Rab27a in complex with Exophilin4 RBD27. The effector packs against the switch and interswitch elements of Rab27a, and specific affinity toward Rab27a is modulated by a shift in the orientation of the effector structural motif (S/T)(G/L)xW(F/Y)(2). The observed structural complementation between the interacting surfaces of Rab27a and Exophilin4 sheds light on the disparities among the Rab27 effectors and outlines a general mechanism for their recruitment.

Elucidation of Rab27 recruitment by its effectors: structure of Rab27a bound to Exophilin4/Slp2-a.,Chavas LM, Ihara K, Kawasaki M, Torii S, Uejima T, Kato R, Izumi T, Wakatsuki S Structure. 2008 Oct 8;16(10):1468-77. PMID:18940603^[4]

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

References

↑ Menasche G, Menager MM, Lefebvre JM, Deutsch E, Athman R, Lambert N, Mahlaoui N, Court M, Garin J, Fischer A, de Saint Basile G. A newly identified isoform of Slp2a associates with Rab27a in cytotoxic T cells and participates to cytotoxic granule secretion. Blood. 2008 Dec 15;112(13):5052-62. doi: 10.1182/blood-2008-02-141069. Epub 2008 , Sep 23. PMID:18812475 doi:http://dx.doi.org/10.1182/blood-2008-02-141069
↑ Yu M, Kasai K, Nagashima K, Torii S, Yokota-Hashimoto H, Okamoto K, Takeuchi T, Gomi H, Izumi T. Exophilin4/Slp2-a targets glucagon granules to the plasma membrane through unique Ca2+-inhibitory phospholipid-binding activity of the C2A domain. Mol Biol Cell. 2007 Feb;18(2):688-96. Epub 2006 Dec 20. PMID:17182843 doi:http://dx.doi.org/10.1091/mbc.E06-10-0914
↑ Holt O, Kanno E, Bossi G, Booth S, Daniele T, Santoro A, Arico M, Saegusa C, Fukuda M, Griffiths GM. Slp1 and Slp2-a localize to the plasma membrane of CTL and contribute to secretion from the immunological synapse. Traffic. 2008 Apr;9(4):446-57. doi: 10.1111/j.1600-0854.2008.00714.x. Epub 2008, Feb 11. PMID:18266782 doi:http://dx.doi.org/10.1111/j.1600-0854.2008.00714.x
↑ Chavas LM, Ihara K, Kawasaki M, Torii S, Uejima T, Kato R, Izumi T, Wakatsuki S. Elucidation of Rab27 recruitment by its effectors: structure of Rab27a bound to Exophilin4/Slp2-a. Structure. 2008 Oct 8;16(10):1468-77. PMID:18940603 doi:10.1016/j.str.2008.07.015

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/3bc1"

@@ Line 3: / Line 3: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[3bc1]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3BC1 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3BC1 FirstGlance]. <br>
-</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GNP:PHOSPHOAMINOPHOSPHONIC+ACID-GUANYLATE+ESTER'>GNP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene><br>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GNP:PHOSPHOAMINOPHOSPHONIC+ACID-GUANYLATE+ESTER'>GNP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
-<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2if0|2if0]], [[2iey|2iey]], [[2iez|2iez]]</td></tr>
+<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2if0|2if0]], [[2iey|2iey]], [[2iez|2iez]]</td></tr>
-<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Small_monomeric_GTPase Small monomeric GTPase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.5.2 3.6.5.2] </span></td></tr>
+<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Small_monomeric_GTPase Small monomeric GTPase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.5.2 3.6.5.2] </span></td></tr>
-<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3bc1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3bc1 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3bc1 RCSB], [http://www.ebi.ac.uk/pdbsum/3bc1 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=3bc1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3bc1 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3bc1 RCSB], [http://www.ebi.ac.uk/pdbsum/3bc1 PDBsum]</span></td></tr>
-<table>
+</table>
+== Function ==
+[[http://www.uniprot.org/uniprot/RB27A_MOUSE RB27A_MOUSE]] Plays a role in cytotoxic granule exocytosis in lymphocytes. Required for both granule maturation and granule docking and priming at the immunologic synapse (By similarity). [[http://www.uniprot.org/uniprot/SYTL2_HUMAN SYTL2_HUMAN]] Isoform 1 acts as a RAB27A effector protein and plays a role in cytotoxic granule exocytosis in lymphocytes. It is required for cytotoxic granule docking at the immunologic synapse. Isoform 4 binds phosphatidylserine (PS) and phosphatidylinositol-4,5-bisphosphate (PIP2) and promotes the recruitment of glucagon-containing granules to the cell membrane in pancreatic alpha cells. Binding to PS is inhibited by Ca(2+) while binding to PIP2 is Ca(2+) insensitive.<ref>PMID:18812475</ref> <ref>PMID:17182843</ref> <ref>PMID:18266782</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 33: / Line 35: @@
 [[Category: Mus musculus]]
 [[Category: Small monomeric GTPase]]
-[[Category: Chavas, L M.G.]]
+[[Category: Chavas, L M.G]]
-[[Category: Ihara, K.]]
+[[Category: Ihara, K]]
-[[Category: Kawasaki, M.]]
+[[Category: Kawasaki, M]]
-[[Category: Wakatsuki, S.]]
+[[Category: Wakatsuki, S]]
 [[Category: Exophilin-4]]
 [[Category: Gdpnp]]

3bc1

From Proteopedia

Revision as of 20:14, 24 December 2014

Crystal Structure of the complex Rab27a-Slp2a

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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