View source for 5joe


==Crystal structure of I81 from titin==
<StructureSection load='5joe' size='340' side='right'caption='[[5joe]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5joe]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5JOE OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=5JOE FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=IPA:ISOPROPYL+ALCOHOL'>IPA</scene></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">TTN ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Non-specific_serine/threonine_protein_kinase Non-specific serine/threonine protein kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.11.1 2.7.11.1] </span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=5joe FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5joe OCA], [http://pdbe.org/5joe PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5joe RCSB], [http://www.ebi.ac.uk/pdbsum/5joe PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5joe ProSAT]</span></td></tr>
</table>
== Disease ==
[[http://www.uniprot.org/uniprot/TITIN_HUMAN TITIN_HUMAN]] Defects in TTN are the cause of hereditary myopathy with early respiratory failure (HMERF) [MIM:[http://omim.org/entry/603689 603689]]; also known as Edstrom myopathy. HMERF is an autosomal dominant, adult-onset myopathy with early respiratory muscle involvement.<ref>PMID:15802564</ref>   Defects in TTN are the cause of familial hypertrophic cardiomyopathy type 9 (CMH9) [MIM:[http://omim.org/entry/613765 613765]]. Familial hypertrophic cardiomyopathy is a hereditary heart disorder characterized by ventricular hypertrophy, which is usually asymmetric and often involves the interventricular septum. The symptoms include dyspnea, syncope, collapse, palpitations, and chest pain. They can be readily provoked by exercise. The disorder has inter- and intrafamilial variability ranging from benign to malignant forms with high risk of cardiac failure and sudden cardiac death.<ref>PMID:10462489</ref>   Defects in TTN are the cause of cardiomyopathy dilated type 1G (CMD1G) [MIM:[http://omim.org/entry/604145 604145]]. Dilated cardiomyopathy is a disorder characterized by ventricular dilation and impaired systolic function, resulting in congestive heart failure and arrhythmia. Patients are at risk of premature death.<ref>PMID:11846417</ref> <ref>PMID:11788824</ref> <ref>PMID:16465475</ref>   Defects in TTN are the cause of tardive tibial muscular dystrophy (TMD) [MIM:[http://omim.org/entry/600334 600334]]; also known as Udd myopathy. TMD is an autosomal dominant, late-onset distal myopathy. Muscle weakness and atrophy are usually confined to the anterior compartment of the lower leg, in particular the tibialis anterior muscle. Clinical symptoms usually occur at age 35-45 years or much later.<ref>PMID:12145747</ref> <ref>PMID:12891679</ref>   Defects in TTN are the cause of limb-girdle muscular dystrophy type 2J (LGMD2J) [MIM:[http://omim.org/entry/608807 608807]]. LGMD2J is an autosomal recessive degenerative myopathy characterized by progressive weakness of the pelvic and shoulder girdle muscles. Severe disability is observed within 20 years of onset.  Defects in TTN are the cause of early-onset myopathy with fatal cardiomyopathy (EOMFC) [MIM:[http://omim.org/entry/611705 611705]]. Early-onset myopathies are inherited muscle disorders that manifest typically from birth or infancy with hypotonia, muscle weakness, and delayed motor development. EOMFC is a titinopathy that, in contrast with the previously described examples, involves both heart and skeletal muscle, has a congenital onset, and is purely recessive. This phenotype is due to homozygous out-of-frame TTN deletions, which lead to a total absence of titin's C-terminal end from striated muscles and to secondary CAPN3 depletion.<ref>PMID:17444505</ref>  
== Function ==
[[http://www.uniprot.org/uniprot/TITIN_HUMAN TITIN_HUMAN]] Key component in the assembly and functioning of vertebrate striated muscles. By providing connections at the level of individual microfilaments, it contributes to the fine balance of forces between the two halves of the sarcomere. The size and extensibility of the cross-links are the main determinants of sarcomere extensibility properties of muscle. In non-muscle cells, seems to play a role in chromosome condensation and chromosome segregation during mitosis. Might link the lamina network to chromatin or nuclear actin, or both during interphase.<ref>PMID:9804419</ref>  
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The cardiac ankyrin repeat protein (CARP) is up-regulated in the myocardium during cardiovascular disease and in response to mechanical or toxic stress. Stress-induced CARP interacts with the N2A spring region of the titin filament to modulate muscle compliance. We characterize the interaction between CARP and titin-N2A and show that the binding site in titin spans the dual domain UN2A-Ig81. We find that the unique sequence UN2A is not structurally disordered, but that it has a stable, elongated alpha-helical fold that possibly acts as a constant force spring. Our findings portray CARP/titin-N2A as a structured node and help to rationalize the molecular basis of CARP mechanosensing in the sarcomeric I-band.

CARP interacts with titin at a unique helical N2A sequence and at the domain Ig81 to form a structured complex.,Zhou T, Fleming JR, Franke B, Bogomolovas J, Barsukov I, Rigden DJ, Labeit S, Mayans O FEBS Lett. 2016 Aug 17. doi: 10.1002/1873-3468.12362. PMID:27531639<ref>PMID:27531639</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5joe" style="background-color:#fffaf0;"></div>

==See Also==
*[[Titin|Titin]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Human]]
[[Category: Large Structures]]
[[Category: Non-specific serine/threonine protein kinase]]
[[Category: Bogomolovas, J]]
[[Category: Fleming, J]]
[[Category: Labeit, S]]
[[Category: Mayans, O]]
[[Category: Zhou, T]]
[[Category: Immunoglobulin]]
[[Category: Structural protein]]
[[Category: Titin]]
[[Category: Transferase]]