1fga: Difference between revisions

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New page: left|200px<br /> <applet load="1fga" size="450" color="white" frame="true" align="right" spinBox="true" caption="1fga, resolution 2.2Å" /> '''REFINEMENT OF THE ST...
 
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[[Image:1fga.gif|left|200px]]<br />
<applet load="1fga" size="450" color="white" frame="true" align="right" spinBox="true"
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'''REFINEMENT OF THE STRUCTURE OF HUMAN BASIC FIBROBLAST GROWTH FACTOR AT 1.6 ANGSTROMS RESOLUTION AND ANALYSIS OF PRESUMED HEPARIN BINDING SITES BY SELENATE SUBSTITUTION'''<br />


==Overview==
==REFINEMENT OF THE STRUCTURE OF HUMAN BASIC FIBROBLAST GROWTH FACTOR AT 1.6 ANGSTROMS RESOLUTION AND ANALYSIS OF PRESUMED HEPARIN BINDING SITES BY SELENATE SUBSTITUTION==
The three-dimensional structure of human basic fibroblast growth factor, has been refined to a crystallographic residual of 16.1% at 1.6 A, resolution. The structure has a Kunitz-type fold and is composed of 12, antiparallel beta-strands, 6 of which form a beta-barrel. One bound, sulfate ion has been identified in the model, hydrogen bonded to the side, chains of Asn 27, Arg 120, and Lys 125. The side chain of Arg 120 has two, conformations, both of which permit hydrogen bonds to the sulfate. This, sulfate binding site has been suggested as the binding site for heparin, (Eriksson, A.E., Cousens, L.S., Weaver, L.H., &amp; Matthews, B.W., 1991, Proc. Natl. Acad. Sci. USA 88, 3441-3445). Two beta-mercaptoethanol (BME), molecules are also included in the model, each forming a disulfide bond to, the S gamma atoms of Cys 69 and Cys 92, respectively. The side chain of, Cys 92 has two conformations of which only one can bind BME. Therefore the, BME molecule is half occupied at this site. The locations of possible, sulfate binding sites on the protein were examined by replacing the, ammonium sulfate in the crystallization medium with ammonium selenate., Diffraction data were measured to 2.2 A resolution and the structure, refined to an R-factor of 13.8%. The binding of the more electron-dense, selenate ion was identified at two positions. One position was identical, to the sulfate binding site identified previously. The second selenate, binding site, which is of lower occupancy, is situated 5.6 A from the, first. This ion is hydrogen bonded by the side chain of Lys 135 and Arg, 120. Thus the side chain of Arg 120 binds two selenate ions, simultaneously. It is suggested that the observed second selenate binding, site should also be considered as a possible binding site for heparin, or, that both selenate binding sites might simultaneously contribute to the, binding of heparin.
<StructureSection load='1fga' size='340' side='right'caption='[[1fga]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1fga]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FGA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1FGA FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.2&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BME:BETA-MERCAPTOETHANOL'>BME</scene>, <scene name='pdbligand=SE4:SELENATE+ION'>SE4</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=1fga FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1fga OCA], [https://pdbe.org/1fga PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1fga RCSB], [https://www.ebi.ac.uk/pdbsum/1fga PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1fga ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/FGF2_HUMAN FGF2_HUMAN] Plays an important role in the regulation of cell survival, cell division, angiogenesis, cell differentiation and cell migration. Functions as potent mitogen in vitro.<ref>PMID:1721615</ref> <ref>PMID:8663044</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/fg/1fga_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.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=1fga ConSurf].
<div style="clear:both"></div>


==Disease==
==See Also==
Known diseases associated with this structure: Hypophosphatemic rickets, autosomal dominant OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=605380 605380]], Osteomalacia, tumor-induced OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=605380 605380]], Tumoral calcinosis, hyperphosphatemic, familial OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=605380 605380]]
*[[Fibroblast growth factor 3D structures|Fibroblast growth factor 3D structures]]
 
== References ==
==About this Structure==
<references/>
1FGA is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with SE4 and BME as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1FGA OCA].
__TOC__
 
</StructureSection>
==Reference==
Refinement of the structure of human basic fibroblast growth factor at 1.6 A resolution and analysis of presumed heparin binding sites by selenate substitution., Eriksson AE, Cousens LS, Matthews BW, Protein Sci. 1993 Aug;2(8):1274-84. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=7691311 7691311]
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Single protein]]
[[Category: Large Structures]]
[[Category: Eriksson, A.E.]]
[[Category: Eriksson AE]]
[[Category: Matthews, B.W.]]
[[Category: Matthews BW]]
[[Category: BME]]
[[Category: SE4]]
[[Category: growth factor]]
 
''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Mon Nov 12 16:52:48 2007''

Latest revision as of 13:14, 20 March 2024

REFINEMENT OF THE STRUCTURE OF HUMAN BASIC FIBROBLAST GROWTH FACTOR AT 1.6 ANGSTROMS RESOLUTION AND ANALYSIS OF PRESUMED HEPARIN BINDING SITES BY SELENATE SUBSTITUTIONREFINEMENT OF THE STRUCTURE OF HUMAN BASIC FIBROBLAST GROWTH FACTOR AT 1.6 ANGSTROMS RESOLUTION AND ANALYSIS OF PRESUMED HEPARIN BINDING SITES BY SELENATE SUBSTITUTION

Structural highlights

1fga is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.2Å
Ligands:,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

FGF2_HUMAN Plays an important role in the regulation of cell survival, cell division, angiogenesis, cell differentiation and cell migration. Functions as potent mitogen in vitro.[1] [2]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

See Also

References

  1. ↑ Shimoyama Y, Gotoh M, Ino Y, Sakamoto M, Kato K, Hirohashi S. Characterization of high-molecular-mass forms of basic fibroblast growth factor produced by hepatocellular carcinoma cells: possible involvement of basic fibroblast growth factor in hepatocarcinogenesis. Jpn J Cancer Res. 1991 Nov;82(11):1263-70. PMID:1721615
  2. ↑ Ornitz DM, Xu J, Colvin JS, McEwen DG, MacArthur CA, Coulier F, Gao G, Goldfarb M. Receptor specificity of the fibroblast growth factor family. J Biol Chem. 1996 Jun 21;271(25):15292-7. PMID:8663044

1fga, resolution 2.20Å

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