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.

1lpu

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 12:41, 13 November 2019

Low Temperature Crystal Structure of the Apo-form of the catalytic subunit of protein kinase CK2 from Zea mays

Structural highlights

1lpu is a 1 chain structure with sequence from Maize. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	1lr4, 1lp4, 1daw, 1day, 1jwh, 1qf8
Activity:	Transferase, with EC number 2.7.11.8, 2.7.11.9, 2.7.11.10, 2.7.11.11, 2.7.11.12, 2.7.11.13, 2.7.11.21, 2.7.11.22, 2.7.11.24, 2.7.11.25, 2.7.11.30 and 2.7.12.1 2.7.11.1, 2.7.11.8, 2.7.11.9, 2.7.11.10, 2.7.11.11, 2.7.11.12, 2.7.11.13, 2.7.11.21, 2.7.11.22, 2.7.11.24, 2.7.11.25, 2.7.11.30 and 2.7.12.1
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[CSK2A_MAIZE] Casein kinases are operationally defined by their preferential utilization of acidic proteins such as caseins as substrates. The alpha chain contains the catalytic site.

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

Protein kinase CK2 (casein kinase 2) is a highly conserved and ubiquitously found eukaryotic serine/threonine kinase that plays a role in various cellular key processes like proliferation, apoptosis and circadian rhythm. One of its prominent biochemical properties is its ability to use GTP as well as ATP as a cosubstrate (dual-cosubstrate specificity). This feature is exceptional among eukaryotic protein kinases, and its biological significance is unknown. We describe here a mutant of the catalytic subunit of protein kinase CK2 (CK2alpha) from Homo sapiens (hsCK2alpha) with a clear and CK2-atypical preference for ATP compared to GTP. This mutant was designed on the basis of several structures of CK2alpha from Zea mays (zmCK2alpha) in complex with various ATP-competitive ligands. A structural overlay revealed the existence of a "purine base binding plane" harbouring the planar moiety of the respective ligand like the purine base of ATP and GTP. This purine base binding plane is sandwiched between the side-chains of Ile66 (Val66 in hsCK2alpha) and Met163, and it adopts a significantly different orientation than in prominent homologues like cAMP-dependent protein kinase (CAPK). By exchanging these two flanking amino acids (Val66Ala, Met163Leu) in hsCK2alpha(1-335), a C-terminally truncated variant of hsCK2alpha, the cosubstrate specificity shifted in the expected direction so that the mutant strongly favours ATP. A structure determination of the mutant in complex with an ATP-analogue confirmed the predicted change of the purine base binding plane orientation. An unexpected but in retrospect plausible consequence of the mutagenesis was, that the helix alpha D region, which is in the direct neighbourhood of the ATP-binding site, has adopted a conformation that is more similar to CAPK and less favourable for binding of GTP. These findings demonstrate that CK2alpha possesses sophisticated structural adaptations in favour of dual-cosubstrate specificity, suggesting that this property could be of biological significance.

Inclining the purine base binding plane in protein kinase CK2 by exchanging the flanking side-chains generates a preference for ATP as a cosubstrate.,Yde CW, Ermakova I, Issinger OG, Niefind K J Mol Biol. 2005 Mar 25;347(2):399-414. Epub 2005 Jan 18. PMID:15740749^[1]

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

References

↑ Yde CW, Ermakova I, Issinger OG, Niefind K. Inclining the purine base binding plane in protein kinase CK2 by exchanging the flanking side-chains generates a preference for ATP as a cosubstrate. J Mol Biol. 2005 Mar 25;347(2):399-414. Epub 2005 Jan 18. PMID:15740749 doi:http://dx.doi.org/10.1016/j.jmb.2005.01.003

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/1lpu"

@@ Line 1: / Line 1: @@
 ==Low Temperature Crystal Structure of the Apo-form of the catalytic subunit of protein kinase CK2 from Zea mays==
-<StructureSection load='1lpu' size='340' side='right' caption='[[1lpu]], [[Resolution|resolution]] 1.86&Aring;' scene=''>
+<StructureSection load='1lpu' size='340' side='right'caption='[[1lpu]], [[Resolution|resolution]] 1.86&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1lpu]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Maize Maize]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LPU OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1LPU FirstGlance]. <br>
@@ Line 30: / Line 30: @@
 </div>
 <div class="pdbe-citations 1lpu" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Casein kinase 3D structures|Casein kinase 3D structures]]
 == References ==
 <references/>
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
 [[Category: Maize]]
 [[Category: Transferase]]

1lpu

From Proteopedia

Revision as of 12:41, 13 November 2019

Low Temperature Crystal Structure of the Apo-form of the catalytic subunit of protein kinase CK2 from Zea mays

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