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.

1h24

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 06:51, 3 January 2018

CDK2/CyclinA in complex with a 9 residue recruitment peptide from E2F

Structural highlights

1h24 is a 5 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
NonStd Res:
Related:	1aq1, 1b38, 1b39, 1buh, 1ckp, 1di8, 1dm2, 1e1v, 1e1x, 1f5q, 1fq1, 1fvt, 1g5s, 1gih, 1gii, 1gij, 1gz8, 1h00, 1h01, 1h06, 1h07, 1h08, 1h0u, 1h0v, 1h0w, 1h1p, 1h1q, 1h1r, 1h1s, 1h25, 1h26, 1h27, 1hck, 1hcl, 1jst, 1jsu, 1jsv, 1jvp, 1ke5, 1ke6, 1ke7, 1ke8, 1ke9, 1qmz, 1fin, 1fvv, 1gy3
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[E2F1_HUMAN] Transcription activator that binds DNA cooperatively with DP proteins through the E2 recognition site, 5'-TTTC[CG]CGC-3' found in the promoter region of a number of genes whose products are involved in cell cycle regulation or in DNA replication. The DRTF1/E2F complex functions in the control of cell-cycle progression from G1 to S phase. E2F1 binds preferentially RB1 in a cell-cycle dependent manner. It can mediate both cell proliferation and TP53/p53-dependent apoptosis.^[1] ^[2] ^[3] ^[4] [CCNA2_HUMAN] Essential for the control of the cell cycle at the G1/S (start) and the G2/M (mitosis) transitions.

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

Progression through S phase of the eukaryotic cell cycle is regulated by the action of the cyclin dependent protein kinase 2 (CDK2) in association with cyclin A. CDK2/cyclin A phosphorylates numerous substrates. Substrate specificity often employs a dual recognition strategy in which the sequence flanking the phospho-acceptor site (Ser.Pro.X.Arg/Lys) is recognized by CDK2, while the cyclin A component of the complex contains a hydrophobic site that binds Arg/Lys.X.Leu ("RXL" or "KXL") substrate recruitment motifs. To determine additional sequence specificity motifs around the RXL sequence, we have performed X-ray crystallographic studies at 2.3 A resolution and isothermal calorimetry measurements on complexes of phospho-CDK2/cyclin A with a recruitment peptide derived from E2F1 and with shorter 11-mer peptides from p53, pRb, p27, E2F1, and p107. The results show that the cyclin recruitment site accommodates a second hydrophobic residue either immediately C-terminal or next adjacent to the leucine of the "RXL" motif and that this site makes important contributions to the recruitment peptide recognition. The arginine of the RXL motif contacts a glutamate, Glu220, on the cyclin. In those substrates that contain a KXL motif, no ionic interactions are observed with the lysine. The sequences N-terminal to the "RXL" motif of the individual peptides show no conservation, but nevertheless make common contacts to the cyclin through main chain interactions. Thus, the recruitment site is able to recognize diverse but conformationally constrained target sequences. The observations have implications for the further identification of physiological substrates of CDK2/cyclin A and the design of specific inhibitors.

Specificity determinants of recruitment peptides bound to phospho-CDK2/cyclin A.,Lowe ED, Tews I, Cheng KY, Brown NR, Gul S, Noble ME, Gamblin SJ, Johnson LN Biochemistry. 2002 Dec 31;41(52):15625-34. PMID:12501191^[5]

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

References

↑ Wu X, Levine AJ. p53 and E2F-1 cooperate to mediate apoptosis. Proc Natl Acad Sci U S A. 1994 Apr 26;91(9):3602-6. PMID:8170954
↑ Martinez-Balbas MA, Bauer UM, Nielsen SJ, Brehm A, Kouzarides T. Regulation of E2F1 activity by acetylation. EMBO J. 2000 Feb 15;19(4):662-71. PMID:10675335 doi:10.1093/emboj/19.4.662
↑ Stevens C, Smith L, La Thangue NB. Chk2 activates E2F-1 in response to DNA damage. Nat Cell Biol. 2003 May;5(5):401-9. PMID:12717439 doi:10.1038/ncb974
↑ Wang C, Rauscher FJ 3rd, Cress WD, Chen J. Regulation of E2F1 function by the nuclear corepressor KAP1. J Biol Chem. 2007 Oct 12;282(41):29902-9. Epub 2007 Aug 17. PMID:17704056 doi:10.1074/jbc.M704757200
↑ Lowe ED, Tews I, Cheng KY, Brown NR, Gul S, Noble ME, Gamblin SJ, Johnson LN. Specificity determinants of recruitment peptides bound to phospho-CDK2/cyclin A. Biochemistry. 2002 Dec 31;41(52):15625-34. PMID:12501191

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1h24"

@@ Line 1: / Line 1: @@
-==CDK2/CYCLIN A IN COMPLEX WITH A 9 RESIDUE RECRUITMENT PEPTIDE FROM E2F==
+==CDK2/CyclinA in complex with a 9 residue recruitment peptide from E2F==
 <StructureSection load='1h24' size='340' side='right' caption='[[1h24]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
 == Structural highlights ==
@@ Line 5: / Line 6: @@
 </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=TPO:PHOSPHOTHREONINE'>TPO</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1aq1|1aq1]], [[1b38|1b38]], [[1b39|1b39]], [[1buh|1buh]], [[1ckp|1ckp]], [[1di8|1di8]], [[1dm2|1dm2]], [[1e1v|1e1v]], [[1e1x|1e1x]], [[1f5q|1f5q]], [[1fq1|1fq1]], [[1fvt|1fvt]], [[1g5s|1g5s]], [[1gih|1gih]], [[1gii|1gii]], [[1gij|1gij]], [[1gz8|1gz8]], [[1h00|1h00]], [[1h01|1h01]], [[1h06|1h06]], [[1h07|1h07]], [[1h08|1h08]], [[1h0u|1h0u]], [[1h0v|1h0v]], [[1h0w|1h0w]], [[1h1p|1h1p]], [[1h1q|1h1q]], [[1h1r|1h1r]], [[1h1s|1h1s]], [[1h25|1h25]], [[1h26|1h26]], [[1h27|1h27]], [[1hck|1hck]], [[1hcl|1hcl]], [[1jst|1jst]], [[1jsu|1jsu]], [[1jsv|1jsv]], [[1jvp|1jvp]], [[1ke5|1ke5]], [[1ke6|1ke6]], [[1ke7|1ke7]], [[1ke8|1ke8]], [[1ke9|1ke9]], [[1qmz|1qmz]], [[1fin|1fin]], [[1fvv|1fvv]], [[1gy3|1gy3]]</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1h24 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1h24 OCA], [http://pdbe.org/1h24 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1h24 RCSB], [http://www.ebi.ac.uk/pdbsum/1h24 PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1h24 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1h24 OCA], [http://pdbe.org/1h24 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1h24 RCSB], [http://www.ebi.ac.uk/pdbsum/1h24 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1h24 ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 13: / Line 14: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/h2/1h24_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/h2/1h24_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 28: / Line 29: @@
 </div>
 <div class="pdbe-citations 1h24" style="background-color:#fffaf0;"></div>
-==See Also==
-*[[Cyclin|Cyclin]]
-*[[Cyclin-dependent kinase|Cyclin-dependent kinase]]
 == References ==
 <references/>

1h24

From Proteopedia

Revision as of 06:51, 3 January 2018

CDK2/CyclinA in complex with a 9 residue recruitment peptide from E2F

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox