View source for 1emn


==NMR STUDY OF A PAIR OF FIBRILLIN CA2+ BINDING EPIDERMAL GROWTH FACTOR-LIKE DOMAINS, MINIMIZED AVERAGE STRUCTURE==
<StructureSection load='1emn' size='340' side='right'caption='[[1emn]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1emn]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EMN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1EMN FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR, 1 model</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></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=1emn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1emn OCA], [https://pdbe.org/1emn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1emn RCSB], [https://www.ebi.ac.uk/pdbsum/1emn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1emn ProSAT]</span></td></tr>
</table>
== Disease ==
[https://www.uniprot.org/uniprot/FBN1_HUMAN FBN1_HUMAN] Defects in FBN1 are a cause of Marfan syndrome (MFS) [MIM:[https://omim.org/entry/154700 154700]. MFS is an autosomal dominant disorder that affects the skeletal, ocular, and cardiovascular systems. A wide variety of skeletal abnormalities occurs with MFS, including scoliosis, chest wall deformity, tall stature, abnormal joint mobility. Ectopia lentis occurs in up to about 80% of MFS patients and is almost always bilateral. The leading cause of premature death in MFS patients is progressive dilation of the aortic root and ascending aorta, causing aortic incompetence and dissection. Note=The majority of the more than 600 mutations in FBN1 currently known are point mutations, the rest are frameshifts and splice site mutations. Marfan syndrome has been suggested in at least 2 historical figures, Abraham Lincoln and Paganini.<ref>PMID:15221638</ref> <ref>PMID:1852208</ref> <ref>PMID:1301946</ref> <ref>PMID:1569206</ref> <ref>PMID:8406497</ref> <ref>PMID:8504310</ref> <ref>PMID:8281141</ref> <ref>PMID:7977366</ref> <ref>PMID:8004112</ref> <ref>PMID:8040326</ref> <ref>PMID:8071963</ref> <ref>PMID:7870075</ref> <ref>PMID:8136837</ref> <ref>PMID:7611299</ref> <ref>PMID:7738200</ref> <ref>PMID:8882780</ref> <ref>PMID:8863159</ref> <ref>PMID:9254848</ref> <ref>PMID:9338581</ref> <ref>PMID:9837823</ref> <ref>PMID:9452085</ref> <ref>PMID:10694921</ref> <ref>PMID:10441597</ref> <ref>PMID:10425041</ref> <ref>PMID:11700157</ref> <ref>PMID:12203992</ref> <ref>PMID:11826022</ref> <ref>PMID:14695540</ref> <ref>PMID:15161917</ref> <ref>PMID:16222657</ref> <ref>PMID:16220557</ref> <ref>PMID:20803651</ref> <ref>PMID:21542060</ref>   Defects in FBN1 are a cause of ectopia lentis, isolated, autosomal dominant (ECTOL1) [MIM:[https://omim.org/entry/129600 129600]. An ocular abnormality characterized by partial or complete displacement of the lens from its space resulting from defective zonule formation.<ref>PMID:11700157</ref> <ref>PMID:12203992</ref> <ref>PMID:11826022</ref> <ref>PMID:8188302</ref>   Defects in FBN1 are the cause of Weill-Marchesani syndrome 2 (WMS2) [MIM:[https://omim.org/entry/608328 608328]. A rare connective tissue disorder characterized by short stature, brachydactyly, joint stiffness, and eye abnormalities including microspherophakia, ectopia lentis, severe myopia and glaucoma.<ref>PMID:12525539</ref>   Defects in FBN1 are a cause of Shprintzen-Goldberg craniosynostosis syndrome (SGS) [MIM:[https://omim.org/entry/182212 182212]. SGS is a very rare syndrome characterized by a marfanoid habitus, craniosynostosis, characteristic dysmorphic facial features, skeletal and cardiovascular abnormalities, mental retardation, developmental delay and learning disabilities.[:]  Defects in FBN1 are a cause of overlap connective tissue disease (OCTD) [MIM:[https://omim.org/entry/604308 604308]. A heritable disorder of connective tissue characterized by involvement of the mitral valve, aorta, skeleton, and skin. MASS syndrome is closely resembling both the Marfan syndrome and the Barlow syndrome. However, no dislocation of the lenses or aneurysmal changes occur in the aorta, and the mitral valve prolapse is by no means invariable.<ref>PMID:2739055</ref>   Defects in FBN1 are a cause of stiff skin syndrome (SSKS) [MIM:[https://omim.org/entry/184900 184900]. It is a syndrome characterized by hard, thick skin, usually over the entire body, which limits joint mobility and causes flexion contractures. Other occasional findings include lipodystrophy and muscle weakness.<ref>PMID:20375004</ref>   Defects in FBN1 are the cause of geleophysic dysplasia type 2 (GPHYSD2) [MIM:[https://omim.org/entry/614185 614185]. An autosomal dominant disorder characterized by severe short stature, short hands and feet, joint limitations, and skin thickening. Radiologic features include delayed bone age, cone-shaped epiphyses, shortened long tubular bones, and ovoid vertebral bodies. Affected individuals have characteristic facial features including a 'happy' face with full cheeks, shortened nose, hypertelorism, long and flat philtrum, and thin upper lip. Other distinctive features include progressive cardiac valvular thickening often leading to an early death, toe walking, tracheal stenosis, respiratory insufficiency, and lysosomal-like storage vacuoles in various tissues.<ref>PMID:21683322</ref>   Defects in FBN1 are the cause of acromicric dysplasia (ACMICD) [MIM:[https://omim.org/entry/102370 102370]. An autosomal dominant disorder characterized by severe short stature, short hands and feet, joint limitations, and skin thickening. Radiologic features include delayed bone age, cone-shaped epiphyses, shortened long tubular bones, and ovoid vertebral bodies. Affected individuals have distinct facial features, including round face, well-defined eyebrows, long eyelashes, bulbous nose with anteverted nostrils, long and prominent philtrum, and thick lips with a small mouth. Other characteristic features include hoarse voice and pseudomuscular build, and there are distinct skeletal features as well, including an internal notch of the femoral head, internal notch of the second metacarpal, and external notch of the fifth metacarpal.<ref>PMID:21683322</ref> 
== Function ==
[https://www.uniprot.org/uniprot/FBN1_HUMAN FBN1_HUMAN] Fibrillins are structural components of 10-12 nm extracellular calcium-binding microfibrils, which occur either in association with elastin or in elastin-free bundles. Fibrillin-1-containing microfibrils provide long-term force bearing structural support. Regulates osteoblast maturation by controlling TGF-beta bioavailability and calibrating TGF-beta and BMP levels, respectively (By similarity).<ref>PMID:15062093</ref> 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/em/1emn_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1emn ConSurf].
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== Publication Abstract from PubMed ==
The nuclear magnetic resonance structure of a covalently linked pair of calcium-binding (cb) epidermal growth factor-like (EGF) domains from human fibrillin-1, the protein defective in the Marfan syndrome, is described. The two domains are in a rigid, rod-like arrangement, stabilized by interdomain calcium binding and hydrophobic interactions. We propose a model for the arrangement of fibrillin monomers in microfibrils that reconciles structural and antibody binding data, and we describe a set of disease-causing mutations that provide the first clues to the specificity of cbEFG interactions. The residues involved in stabilizing the domain linkage are highly conserved in fibrillin, fibulin, thrombomodulin, and the low density lipoprotein receptor. We propose that the relative orientation of tandem cbEGF domains in these proteins is similar, but that in others, including Notch, pairs adopt a completely different conformation.

Solution structure of a pair of calcium-binding epidermal growth factor-like domains: implications for the Marfan syndrome and other genetic disorders.,Downing AK, Knott V, Werner JM, Cardy CM, Campbell ID, Handford PA Cell. 1996 May 17;85(4):597-605. PMID:8653794<ref>PMID:8653794</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Campbell ID]]
[[Category: Downing AK]]
[[Category: Handford PA]]