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| | ==Crystal structure of L68V mutant of human cystatin C== | | ==Crystal structure of L68V mutant of human cystatin C== |
| - | <StructureSection load='3ps8' size='340' side='right' caption='[[3ps8]], [[Resolution|resolution]] 2.55Å' scene=''> | + | <StructureSection load='3ps8' size='340' side='right'caption='[[3ps8]], [[Resolution|resolution]] 2.55Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3ps8]] 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=3PS8 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3PS8 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3ps8]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3PS8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3PS8 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene></td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1g96|1g96]], [[1r4c|1r4c]], [[1tij|1tij]], [[3gax|3gax]], [[3nx0|3nx0]]</td></tr> | + | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1g96|1g96]], [[1r4c|1r4c]], [[1tij|1tij]], [[3gax|3gax]], [[3nx0|3nx0]]</div></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CST3 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr> | + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CST3 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</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=3ps8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ps8 OCA], [http://pdbe.org/3ps8 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3ps8 RCSB], [http://www.ebi.ac.uk/pdbsum/3ps8 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3ps8 ProSAT]</span></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=3ps8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ps8 OCA], [https://pdbe.org/3ps8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3ps8 RCSB], [https://www.ebi.ac.uk/pdbsum/3ps8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3ps8 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Disease == | | == Disease == |
| - | [[http://www.uniprot.org/uniprot/CYTC_HUMAN CYTC_HUMAN]] Defects in CST3 are the cause of amyloidosis type 6 (AMYL6) [MIM:[http://omim.org/entry/105150 105150]]; also known as hereditary cerebral hemorrhage with amyloidosis (HCHWA), cerebral amyloid angiopathy (CAA) or cerebroarterial amyloidosis Icelandic type. AMYL6 is a hereditary generalized amyloidosis due to cystatin C amyloid deposition. Cystatin C amyloid accumulates in the walls of arteries, arterioles, and sometimes capillaries and veins of the brain, and in various organs including lymphoid tissue, spleen, salivary glands, and seminal vesicles. Amyloid deposition in the cerebral vessels results in cerebral amyloid angiopathy, cerebral hemorrhage and premature stroke. Cystatin C levels in the cerebrospinal fluid are abnormally low.<ref>PMID:2541223</ref> <ref>PMID:1352269</ref> Genetic variations in CST3 are associated with age-related macular degeneration type 11 (ARMD11) [MIM:[http://omim.org/entry/611953 611953]]. ARMD is a multifactorial eye disease and the most common cause of irreversible vision loss in the developed world. In most patients, the disease is manifest as ophthalmoscopically visible yellowish accumulations of protein and lipid that lie beneath the retinal pigment epithelium and within an elastin-containing structure known as Bruch membrane.<ref>PMID:11815350</ref> | + | [[https://www.uniprot.org/uniprot/CYTC_HUMAN CYTC_HUMAN]] Defects in CST3 are the cause of amyloidosis type 6 (AMYL6) [MIM:[https://omim.org/entry/105150 105150]]; also known as hereditary cerebral hemorrhage with amyloidosis (HCHWA), cerebral amyloid angiopathy (CAA) or cerebroarterial amyloidosis Icelandic type. AMYL6 is a hereditary generalized amyloidosis due to cystatin C amyloid deposition. Cystatin C amyloid accumulates in the walls of arteries, arterioles, and sometimes capillaries and veins of the brain, and in various organs including lymphoid tissue, spleen, salivary glands, and seminal vesicles. Amyloid deposition in the cerebral vessels results in cerebral amyloid angiopathy, cerebral hemorrhage and premature stroke. Cystatin C levels in the cerebrospinal fluid are abnormally low.<ref>PMID:2541223</ref> <ref>PMID:1352269</ref> Genetic variations in CST3 are associated with age-related macular degeneration type 11 (ARMD11) [MIM:[https://omim.org/entry/611953 611953]]. ARMD is a multifactorial eye disease and the most common cause of irreversible vision loss in the developed world. In most patients, the disease is manifest as ophthalmoscopically visible yellowish accumulations of protein and lipid that lie beneath the retinal pigment epithelium and within an elastin-containing structure known as Bruch membrane.<ref>PMID:11815350</ref> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/CYTC_HUMAN CYTC_HUMAN]] As an inhibitor of cysteine proteinases, this protein is thought to serve an important physiological role as a local regulator of this enzyme activity. | + | [[https://www.uniprot.org/uniprot/CYTC_HUMAN CYTC_HUMAN]] As an inhibitor of cysteine proteinases, this protein is thought to serve an important physiological role as a local regulator of this enzyme activity. |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Human]] | | [[Category: Human]] |
| | + | [[Category: Large Structures]] |
| | [[Category: Borek, D]] | | [[Category: Borek, D]] |
| | [[Category: Orlikowska, M]] | | [[Category: Orlikowska, M]] |
| Structural highlights
Disease
[CYTC_HUMAN] Defects in CST3 are the cause of amyloidosis type 6 (AMYL6) [MIM:105150]; also known as hereditary cerebral hemorrhage with amyloidosis (HCHWA), cerebral amyloid angiopathy (CAA) or cerebroarterial amyloidosis Icelandic type. AMYL6 is a hereditary generalized amyloidosis due to cystatin C amyloid deposition. Cystatin C amyloid accumulates in the walls of arteries, arterioles, and sometimes capillaries and veins of the brain, and in various organs including lymphoid tissue, spleen, salivary glands, and seminal vesicles. Amyloid deposition in the cerebral vessels results in cerebral amyloid angiopathy, cerebral hemorrhage and premature stroke. Cystatin C levels in the cerebrospinal fluid are abnormally low.[1] [2] Genetic variations in CST3 are associated with age-related macular degeneration type 11 (ARMD11) [MIM:611953]. ARMD is a multifactorial eye disease and the most common cause of irreversible vision loss in the developed world. In most patients, the disease is manifest as ophthalmoscopically visible yellowish accumulations of protein and lipid that lie beneath the retinal pigment epithelium and within an elastin-containing structure known as Bruch membrane.[3]
Function
[CYTC_HUMAN] As an inhibitor of cysteine proteinases, this protein is thought to serve an important physiological role as a local regulator of this enzyme activity.
Publication Abstract from PubMed
Wild-type human cystatin C (hCC wt) is a low-molecular-mass protein (120 amino-acid residues, 13 343 Da) that is found in all nucleated cells. Physiologically, it functions as a potent regulator of cysteine protease activity. While the biologically active hCC wt is a monomeric protein, all crystallization efforts to date have resulted in a three-dimensional domain-swapped dimeric structure. In the recently published structure of a mutated hCC, the monomeric fold was preserved by a stabilization of the conformationally constrained loop L1 caused by a single amino-acid substitution: Val57Asn. Additional hCC mutants were obtained in order to elucidate the relationship between the stability of the L1 loop and the propensity of human cystatin C to dimerize. In one mutant Val57 was substituted by an aspartic acid residue, which is favoured in beta-turns, and in the second mutant proline, a residue known for broadening turns, was substituted for the same Val57. Here, 2.26 and 3.0 A resolution crystal structures of the V57D andV57P mutants of hCC are reported and their dimeric architecture is discussed in terms of the stabilization and destabilization effects of the introduced mutations.
Structural characterization of V57D and V57P mutants of human cystatin C, an amyloidogenic protein.,Orlikowska M, Szymanska A, Borek D, Otwinowski Z, Skowron P, Jankowska E Acta Crystallogr D Biol Crystallogr. 2013 Apr;69(Pt 4):577-86. doi:, 10.1107/S0907444912051657. Epub 2013 Mar 14. PMID:23519666[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Levy E, Lopez-Otin C, Ghiso J, Geltner D, Frangione B. Stroke in Icelandic patients with hereditary amyloid angiopathy is related to a mutation in the cystatin C gene, an inhibitor of cysteine proteases. J Exp Med. 1989 May 1;169(5):1771-8. PMID:2541223
- ↑ Abrahamson M, Jonsdottir S, Olafsson I, Jensson O, Grubb A. Hereditary cystatin C amyloid angiopathy: identification of the disease-causing mutation and specific diagnosis by polymerase chain reaction based analysis. Hum Genet. 1992 Jun;89(4):377-80. PMID:1352269
- ↑ Zurdel J, Finckh U, Menzer G, Nitsch RM, Richard G. CST3 genotype associated with exudative age related macular degeneration. Br J Ophthalmol. 2002 Feb;86(2):214-9. PMID:11815350
- ↑ Orlikowska M, Szymanska A, Borek D, Otwinowski Z, Skowron P, Jankowska E. Structural characterization of V57D and V57P mutants of human cystatin C, an amyloidogenic protein. Acta Crystallogr D Biol Crystallogr. 2013 Apr;69(Pt 4):577-86. doi:, 10.1107/S0907444912051657. Epub 2013 Mar 14. PMID:23519666 doi:http://dx.doi.org/10.1107/S0907444912051657
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