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.

1k9a

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 09:38, 6 November 2019

Crystal structure analysis of full-length carboxyl-terminal Src kinase at 2.5 A resolution

Structural highlights

1k9a is a 6 chain structure with sequence from Buffalo rat. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1byg, 1csk, 3lck, 1ad5, 1fmk, 1jwo
Activity:	Transferase, with EC number and 2.7.10.2 2.7.10.1 and 2.7.10.2
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[CSK_RAT] Non-receptor tyrosine-protein kinase that plays an important role in the regulation of cell growth, differentiation, migration and immune response. Phosphorylates tyrosine residues located in the C-terminal tails of Src-family kinases (SFKs) including LCK, SRC, HCK, FYN, LYN or YES1. Upon tail phosphorylation, Src-family members engage in intramolecular interactions between the phosphotyrosine tail and the SH2 domain that result in an inactive conformation. To inhibit SFKs, CSK is recruited to the plasma membrane via binding to transmembrane proteins or adapter proteins located near the plasma membrane. Suppresses signaling by various surface receptors, including T-cell receptor (TCR) and B-cell receptor (BCR) by phosphorylating and maintaining inactive several positive effectors such as FYN or LCK (By similarity).^[1] ^[2]

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

The carboxyl-terminal Src kinase (Csk) is an indispensable negative regulator for the Src family tyrosine kinases (SFKs) that play pivotal roles in various cell signalings. To understand the molecular basis of the Csk-mediated regulation of SFKs, we elucidated the crystal structure of full-length Csk. The Csk crystal consists of six molecules classified as active or inactive states according to the coordinations of catalytic residues. Csk assembles the SH2 and SH3 domains differently from inactive SFKs, and their binding pockets are oriented outward enabling the intermolecular interaction. In active molecules, the SH2-kinase and SH2-SH3 linkers are tightly stuck to the N-lobe of the kinase domain to stabilize the active conformation, and there is a direct linkage between the SH2 and the kinase domains. In inactive molecules, the SH2 domains are rotated destroying the linkage to the kinase domain. Cross-correlation matrices for the active molecules reveal that the SH2 domain and the N-lobe of the kinase domain move as a unit. These observations suggest that Csk can be regulated through coupling of the SH2 and kinase domains and that Csk provides a novel built-in activation mechanism for cytoplasmic tyrosine kinases.

Structure of the carboxyl-terminal Src kinase, Csk.,Ogawa A, Takayama Y, Sakai H, Chong KT, Takeuchi S, Nakagawa A, Nada S, Okada M, Tsukihara T J Biol Chem. 2002 Apr 26;277(17):14351-4. Epub 2002 Mar 7. PMID:11884384^[3]

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

References

↑ Okada M, Nada S, Yamanashi Y, Yamamoto T, Nakagawa H. CSK: a protein-tyrosine kinase involved in regulation of src family kinases. J Biol Chem. 1991 Dec 25;266(36):24249-52. PMID:1722201
↑ Ruzzene M, James P, Brunati AM, Donella-Deana A, Pinna LA. Regulation of c-Fgr protein kinase by c-Src kinase (CSK) and by polycationic effectors. J Biol Chem. 1994 Jun 3;269(22):15885-91. PMID:7515063
↑ Ogawa A, Takayama Y, Sakai H, Chong KT, Takeuchi S, Nakagawa A, Nada S, Okada M, Tsukihara T. Structure of the carboxyl-terminal Src kinase, Csk. J Biol Chem. 2002 Apr 26;277(17):14351-4. Epub 2002 Mar 7. PMID:11884384 doi:10.1074/jbc.C200086200

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1k9a"

@@ Line 1: / Line 1: @@
 ==Crystal structure analysis of full-length carboxyl-terminal Src kinase at 2.5 A resolution==
-<StructureSection load='1k9a' size='340' side='right' caption='[[1k9a]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
+<StructureSection load='1k9a' size='340' side='right'caption='[[1k9a]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1k9a]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Buffalo_rat Buffalo rat]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1K9A OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1K9A FirstGlance]. <br>
@@ Line 29: / Line 29: @@
 </div>
 <div class="pdbe-citations 1k9a" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Tyrosine kinase|Tyrosine kinase]]
 == References ==
 <references/>
@@ Line 34: / Line 37: @@
 </StructureSection>
 [[Category: Buffalo rat]]
+[[Category: Large Structures]]
 [[Category: Transferase]]
 [[Category: Chong, K T]]

1k9a

From Proteopedia

Revision as of 09:38, 6 November 2019

Crystal structure analysis of full-length carboxyl-terminal Src kinase at 2.5 A resolution

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox