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[[Image:3znc.gif|left|200px]]


{{Structure
==MURINE CARBONIC ANHYDRASE IV COMPLEXED WITH BRINZOLAMIDE==
|PDB= 3znc |SIZE=350|CAPTION= <scene name='initialview01'>3znc</scene>, resolution 2.8&Aring;
<StructureSection load='3znc' size='340' side='right'caption='[[3znc]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
|SITE= <scene name='pdbsite=ZN:Zn+Binding+Site'>ZN</scene>
== Structural highlights ==
|LIGAND= <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene> and <scene name='pdbligand=BZ1:(+)-4-ETHYLAMINO-3,4-DIHYDRO-2-(METHOXY)PROPYL-2H-THIENO[3,2-E]-1,2-THIAZINE-6-SULFONAMIDE-1,1-DIOXIDE'>BZ1</scene>
<table><tr><td colspan='2'>[[3znc]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3ZNC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3ZNC FirstGlance]. <br>
|ACTIVITY= [http://en.wikipedia.org/wiki/Carbonate_dehydratase Carbonate dehydratase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.2.1.1 4.2.1.1]  
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.8&#8491;</td></tr>
|GENE= MURINE CAIV ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 Mus musculus])
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BZ1:(+)-4-ETHYLAMINO-3,4-DIHYDRO-2-(METHOXY)PROPYL-2H-THIENO[3,2-E]-1,2-THIAZINE-6-SULFONAMIDE-1,1-DIOXIDE'>BZ1</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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=3znc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3znc OCA], [https://pdbe.org/3znc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3znc RCSB], [https://www.ebi.ac.uk/pdbsum/3znc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3znc ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CAH4_MOUSE CAH4_MOUSE] Reversible hydration of carbon dioxide. May stimulate the sodium/bicarbonate transporter activity of SLC4A4 (By similarity).
== 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/zn/3znc_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=3znc ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Carbonic anhydrase IV (CAIV) is a membrane-associated enzyme anchored to plasma membrane surfaces by a phosphatidylinositol glycan linkage. We have determined the 2.8-angstroms resolution crystal structure of a truncated, soluble form of recombinant murine CAIV. We have also determined the structure of its complex with a drug used for glaucoma therapy, the sulfonamide inhibitor brinzolamide (Azopt). The overall structure of murine CAIV is generally similar to that of human CAIV; however, some local structural differences are found in the active site resulting from amino acid sequence differences in the "130's segment" and the residue-63 loop (these may affect the nearby catalytic proton shuttle, His-64). Similar to human CAIV, the C-terminus of murine CAIV is surrounded by a substantial electropositive surface potential that may stabilize the interaction with the phospholipid membrane. Binding interactions observed for brinzolamide rationalize the generally weaker affinity of inhibitors used in glaucoma therapy toward CAIV compared with CAII.


'''MURINE CARBONIC ANHYDRASE IV COMPLEXED WITH BRINZOLAMIDE'''
Structures of murine carbonic anhydrase IV and human carbonic anhydrase II complexed with brinzolamide: molecular basis of isozyme-drug discrimination.,Stams T, Chen Y, Boriack-Sjodin PA, Hurt JD, Liao J, May JA, Dean T, Laipis P, Silverman DN, Christianson DW Protein Sci. 1998 Mar;7(3):556-63. PMID:9541386<ref>PMID:9541386</ref>


From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3znc" style="background-color:#fffaf0;"></div>


==Overview==
==See Also==
Carbonic anhydrase IV (CAIV) is a membrane-associated enzyme anchored to plasma membrane surfaces by a phosphatidylinositol glycan linkage. We have determined the 2.8-angstroms resolution crystal structure of a truncated, soluble form of recombinant murine CAIV. We have also determined the structure of its complex with a drug used for glaucoma therapy, the sulfonamide inhibitor brinzolamide (Azopt). The overall structure of murine CAIV is generally similar to that of human CAIV; however, some local structural differences are found in the active site resulting from amino acid sequence differences in the "130's segment" and the residue-63 loop (these may affect the nearby catalytic proton shuttle, His-64). Similar to human CAIV, the C-terminus of murine CAIV is surrounded by a substantial electropositive surface potential that may stabilize the interaction with the phospholipid membrane. Binding interactions observed for brinzolamide rationalize the generally weaker affinity of inhibitors used in glaucoma therapy toward CAIV compared with CAII.
*[[Carbonic anhydrase 3D structures|Carbonic anhydrase 3D structures]]
 
== References ==
==About this Structure==
<references/>
3ZNC is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3ZNC OCA].
__TOC__
 
</StructureSection>
==Reference==
[[Category: Large Structures]]
Structures of murine carbonic anhydrase IV and human carbonic anhydrase II complexed with brinzolamide: molecular basis of isozyme-drug discrimination., Stams T, Chen Y, Boriack-Sjodin PA, Hurt JD, Liao J, May JA, Dean T, Laipis P, Silverman DN, Christianson DW, Protein Sci. 1998 Mar;7(3):556-63. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9541386 9541386]
[[Category: Carbonate dehydratase]]
[[Category: Mus musculus]]
[[Category: Mus musculus]]
[[Category: Single protein]]
[[Category: Chen Y]]
[[Category: Chen, Y.]]
[[Category: Christianson DW]]
[[Category: Christianson, D W.]]
[[Category: Stams T]]
[[Category: Stams, T.]]
[[Category: BZ1]]
[[Category: ZN]]
[[Category: inhibitor]]
[[Category: lyase]]
[[Category: membrane]]
[[Category: murine]]
[[Category: zinc]]
 
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