7mbk
From Proteopedia
(Difference between revisions)
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==N-terminal domain of mouse surfactant protein B, 6W mutant== | ==N-terminal domain of mouse surfactant protein B, 6W mutant== | ||
| - | <StructureSection load='7mbk' size='340' side='right'caption='[[7mbk]]' scene=''> | + | <StructureSection load='7mbk' size='340' side='right'caption='[[7mbk]], [[Resolution|resolution]] 2.17Å' scene=''> |
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7MBK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7MBK FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[7mbk]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7MBK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7MBK FirstGlance]. <br> |
| - | </td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=7mbk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7mbk OCA], [https://pdbe.org/7mbk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7mbk RCSB], [https://www.ebi.ac.uk/pdbsum/7mbk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7mbk ProSAT]</span></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.17Å</td></tr> |
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=7mbk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7mbk OCA], [https://pdbe.org/7mbk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7mbk RCSB], [https://www.ebi.ac.uk/pdbsum/7mbk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7mbk ProSAT]</span></td></tr> | ||
</table> | </table> | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/PSPB_MOUSE PSPB_MOUSE] Pulmonary surfactant-associated proteins promote alveolar stability by lowering the surface tension at the air-liquid interface in the peripheral air spaces. SP-B increases the collapse pressure of palmitic acid to nearly 70 millinewtons per meter. | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Breathing depends on pulmonary surfactant, a mixture of phospholipids and proteins, secreted by alveolar type II cells. Surfactant requires lamellar bodies (LBs), organelles containing densely packed concentric membrane layers, for storage and secretion. LB biogenesis remains mysterious but requires surfactant protein B (SP-B), which is synthesized as a precursor (pre-proSP-B) that is cleaved during trafficking into three related proteins. Here, we elucidate the functions and cooperation of these proteins in LB formation. We show that the N-terminal domain of proSP-B is a phospholipid-binding and -transfer protein whose activities are required for proSP-B export from the endoplasmic reticulum (ER) and sorting to LBs, the conversion of proSP-B into lipoprotein particles, and neonatal viability in mice. The C-terminal domain facilitates ER export of proSP-B. The mature middle domain, generated after proteolytic cleavage of proSP-B, generates the striking membrane layers characteristic of LBs. Together, our results lead to a mechanistic model of LB biogenesis. | ||
| + | |||
| + | Mechanism of Lamellar Body Formation by Lung Surfactant Protein B.,Sever N, Milicic G, Bodnar NO, Wu X, Rapoport TA Mol Cell. 2020 Nov 17. pii: S1097-2765(20)30776-0. doi:, 10.1016/j.molcel.2020.10.042. PMID:33242393<ref>PMID:33242393</ref> | ||
| + | |||
| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | <div class="pdbe-citations 7mbk" style="background-color:#fffaf0;"></div> | ||
| + | == References == | ||
| + | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
| + | [[Category: Mus musculus]] | ||
[[Category: Milicic G]] | [[Category: Milicic G]] | ||
[[Category: Rapoport TA]] | [[Category: Rapoport TA]] | ||
Revision as of 16:08, 18 October 2023
N-terminal domain of mouse surfactant protein B, 6W mutant
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