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.

5kc7

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 12:46, 26 July 2023

Crystal structure of Cbln1 (Val55-Gly58 deletion mutant)

Structural highlights

5kc7 is a 4 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 7.035Å
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

CBLN1_HUMAN Required for synapse integrity and synaptic plasticity. During cerebellar synapse formation, essential for the formation and maintenance of parallel fiber and Purkinje cell synapses. When parallel fibers make contact with Purkinje spines, CBLN1 interaction with GRID2 triggers the recruitment of NRXN1 and secretory vesicles to the sites of contact. NRXN1-CBLN1-GRID2 signaling induces presynaptic morphological changes, which may further accumulate pre- and postsynaptic components to promote bidirectional maturation of parallel fiber - Purkinje cell functionally active synapses by a positive feedback mechanism. Required for CBLN3 export from the endoplasmic reticulum and secretion (By similarity). The cerebellin peptide exerts neuromodulatory functions. Directly stimulates norepinephrine release via the adenylate cyclase/PKA-dependent signaling pathway; and indirectly enhances adrenocortical secretion in vivo, through a paracrine mechanism involving medullary catecholamine release (By similarity).

Publication Abstract from PubMed

Ionotropic glutamate receptor (iGluR) family members are integrated into supramolecular complexes that modulate their location and function at excitatory synapses. However, a lack of structural information beyond isolated receptors or fragments thereof currently limits the mechanistic understanding of physiological iGluR signaling. Here, we report structural and functional analyses of the prototypical molecular bridge linking postsynaptic iGluR delta2 (GluD2) and presynaptic beta-neurexin 1 (beta-NRX1) via Cbln1, a C1q-like synaptic organizer. We show how Cbln1 hexamers "anchor" GluD2 amino-terminal domain dimers to monomeric beta-NRX1. This arrangement promotes synaptogenesis and is essential for D: -serine-dependent GluD2 signaling in vivo, which underlies long-term depression of cerebellar parallel fiber-Purkinje cell (PF-PC) synapses and motor coordination in developing mice. These results lead to a model where protein and small-molecule ligands synergistically control synaptic iGluR function.

Structural basis for integration of GluD receptors within synaptic organizer complexes.,Elegheert J, Kakegawa W, Clay JE, Shanks NF, Behiels E, Matsuda K, Kohda K, Miura E, Rossmann M, Mitakidis N, Motohashi J, Chang VT, Siebold C, Greger IH, Nakagawa T, Yuzaki M, Aricescu AR Science. 2016 Jul 15;353(6296):295-9. doi: 10.1126/science.aae0104. PMID:27418511^[1]

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

References

↑ Elegheert J, Kakegawa W, Clay JE, Shanks NF, Behiels E, Matsuda K, Kohda K, Miura E, Rossmann M, Mitakidis N, Motohashi J, Chang VT, Siebold C, Greger IH, Nakagawa T, Yuzaki M, Aricescu AR. Structural basis for integration of GluD receptors within synaptic organizer complexes. Science. 2016 Jul 15;353(6296):295-9. doi: 10.1126/science.aae0104. PMID:27418511 doi:http://dx.doi.org/10.1126/science.aae0104

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/5kc7"

Categories: Homo sapiens | Large Structures | Aricescu AR | Elegheert J

@@ Line 4: / Line 4: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[5kc7]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5KC7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5KC7 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=5kc7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5kc7 OCA], [https://pdbe.org/5kc7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5kc7 RCSB], [https://www.ebi.ac.uk/pdbsum/5kc7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5kc7 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]] 7.035&#8491;</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=5kc7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5kc7 OCA], [https://pdbe.org/5kc7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5kc7 RCSB], [https://www.ebi.ac.uk/pdbsum/5kc7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5kc7 ProSAT]</span></td></tr>
 </table>
 == Function ==

5kc7

From Proteopedia

Revision as of 12:46, 26 July 2023

Crystal structure of Cbln1 (Val55-Gly58 deletion mutant)

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox