This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.


3msp

From Proteopedia

(Difference between revisions)
Jump to: navigation, search
Line 1: Line 1:
-
[[Image:3msp.jpg|left|200px]]
+
{{Seed}}
 +
[[Image:3msp.png|left|200px]]
<!--
<!--
Line 9: Line 10:
{{STRUCTURE_3msp| PDB=3msp | SCENE= }}
{{STRUCTURE_3msp| PDB=3msp | SCENE= }}
-
'''MOTILE MAJOR SPERM PROTEIN (MSP) OF ASCARIS SUUM, NMR, 20 STRUCTURES'''
+
===MOTILE MAJOR SPERM PROTEIN (MSP) OF ASCARIS SUUM, NMR, 20 STRUCTURES===
-
==Overview==
+
<!--
-
The major sperm protein (MSP) of Ascaris suum mediates amoeboid motility by forming an extensive intermeshed system of cytoskeletal filaments analogous to that formed by actin in many other amoeboid cells. MSP is a dimeric molecule that polymerizes to form non-polar filaments constructed from two helical subfilaments that wind round one another. Moreover, MSP filaments can interact with one another to form higher-order assemblies without requiring the range of accessory proteins usually employed in actin-based systems. A knowledge of how MSP polymerizes and forms the hierarchical series of helical MSP macromolecular assemblies is fundamental to understanding locomotion in these cells. Here we describe the solution structure of MSP dimers determined by NMR spectroscopy under conditions where MSP does not polymerize to form filaments. The solution structure is indistinguishable from that observed in putative MSP subfilament helices by X-ray crystallography, indicating that MSP polymerization is not accompanied by a major conformational change. We also show that the rate of MSP polymerization associated with movement of vesicles in an in vitro motility assay is enhanced by the presence of magnesium and manganese ions and use NMR to show that the primary residues that bind these ions are 24-25 and 83-86. These residues are distant from the interface formed between MSP dimers in subfilament helices, and so are probably not involved in this level of polymerization. Instead the manganese and magnesium ion binding appears to be associated with the assembly of subfilaments into filaments and their subsequent aggregation into bundles.
+
The line below this paragraph, {{ABSTRACT_PUBMED_9878374}}, adds the Publication Abstract to the page
 +
(as it appears on PubMed at http://www.pubmed.gov), where 9878374 is the PubMed ID number.
 +
-->
 +
{{ABSTRACT_PUBMED_9878374}}
==About this Structure==
==About this Structure==
-
3MSP is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Ascaris_suum Ascaris suum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3MSP OCA].
+
3MSP is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Ascaris_suum Ascaris suum]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3MSP OCA].
==Reference==
==Reference==
Line 35: Line 39:
[[Category: Nmr structure]]
[[Category: Nmr structure]]
[[Category: Polymerization]]
[[Category: Polymerization]]
-
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 22:07:33 2008''
+
 
 +
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Jul 3 12:56:41 2008''

Revision as of 09:56, 3 July 2008

Image:3msp.png

Template:STRUCTURE 3msp

MOTILE MAJOR SPERM PROTEIN (MSP) OF ASCARIS SUUM, NMR, 20 STRUCTURES

Template:ABSTRACT PUBMED 9878374

About this Structure

3MSP is a Single protein structure of sequence from Ascaris suum. Full experimental information is available from OCA.

Reference

Solution structure of the motile major sperm protein (MSP) of Ascaris suum - evidence for two manganese binding sites and the possible role of divalent cations in filament formation., Haaf A, LeClaire L 3rd, Roberts G, Kent HM, Roberts TM, Stewart M, Neuhaus D, J Mol Biol. 1998 Dec 18;284(5):1611-24. PMID:9878374

Page seeded by OCA on Thu Jul 3 12:56:41 2008

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3msp"
Personal tools