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| | <StructureSection load='3f7p' size='340' side='right'caption='[[3f7p]], [[Resolution|resolution]] 2.75Å' scene=''> | | <StructureSection load='3f7p' size='340' side='right'caption='[[3f7p]], [[Resolution|resolution]] 2.75Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3f7p]] is a 5 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=3F7P OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3F7P FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3f7p]] is a 5 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=3F7P OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3F7P FirstGlance]. <br> |
| - | </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>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.75Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1qg3|1qg3]], [[1mb8|1mb8]], [[1sh5|1sh5]], [[1sh6|1sh6]], [[3f7q|3f7q]], [[3f7r|3f7r]]</div></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>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">PLEC-1 (Isoform 1C), PLEC1 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), ITGB4 ([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'>[https://proteopedia.org/fgij/fg.htm?mol=3f7p FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3f7p OCA], [https://pdbe.org/3f7p PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3f7p RCSB], [https://www.ebi.ac.uk/pdbsum/3f7p PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3f7p 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=3f7p FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3f7p OCA], [https://pdbe.org/3f7p PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3f7p RCSB], [https://www.ebi.ac.uk/pdbsum/3f7p PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3f7p ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Disease == | | == Disease == |
| - | [[https://www.uniprot.org/uniprot/PLEC_HUMAN PLEC_HUMAN]] Defects in PLEC are the cause of epidermolysis bullosa simplex with pyloric atresia (EBS-PA) [MIM:[https://omim.org/entry/612138 612138]]. EBS-PA is an autosomal recessive genodermatosis characterized by severe skin blistering at birth and congenital pyloric atresia. Death usually occurs in infancy. This disorder is allelic to MD-EBS.<ref>PMID:8698233</ref> <ref>PMID:20665883</ref> <ref>PMID:14675180</ref> Defects in PLEC are the cause of epidermolysis bullosa simplex with muscular dystrophy (MD-EBS) [MIM:[https://omim.org/entry/226670 226670]]. MD-EBS is an autosomal recessive disorder characterized by epidermal blister formation at the level of the hemidesmosome and associated with late-onset muscular dystrophy. Defects in PLEC are the cause of epidermolysis bullosa simplex Ogna type (O-EBS) [MIM:[https://omim.org/entry/131950 131950]]; also called epidermolysis bullosa simplex 1. O-EBS is a form of intraepidermal epidermolysis bullosa characterized by generalized skin bruising, skin fragility with non-scarring blistering and small hemorrhagic blisters on hands. At the ultrastructural level, it is differentiated from classical cases of K-EBS, WC-EBS and DM-EBS, by the occurrence of blisters originating in basal cells above hemidesmosomes, and abnormal hemidesmosome intracellular attachment plates. Defects in PLEC are the cause of limb-girdle muscular dystrophy type 2Q (LGMD2Q) [MIM:[https://omim.org/entry/613723 613723]]. An autosomal recessive degenerative myopathy characterized by early childhood onset of proximal muscle weakness. Note=A 9 bp deletion containing the initiation codon in exon 1f of PLEC have been found in limb-girdle muscular dystrophy patients. The mutation results in deficient expression of isoform 9 and disorganization of the myofibers, without any effect on the skin.<ref>PMID:21109228</ref> <ref>PMID:8698233</ref> [[https://www.uniprot.org/uniprot/ITB4_HUMAN ITB4_HUMAN]] Defects in ITGB4 are a cause of epidermolysis bullosa letalis with pyloric atresia (EB-PA) [MIM:[https://omim.org/entry/226730 226730]]; also known as junctional epidermolysis bullosa with pyloric atresia (PA-JEB) or aplasia cutis congenita with gastrointestinal atresia. EB-PA is an autosomal recessive, frequently lethal, epidermolysis bullosa with variable involvement of skin, nails, mucosa, and with variable effects on the digestive system. It is characterized by mucocutaneous fragility, aplasia cutis congenita, and gastrointestinal atresia, which most commonly affects the pylorus. Pyloric atresia is a primary manifestation rather than a scarring process secondary to epidermolysis bullosa.<ref>PMID:9792864</ref> <ref>PMID:9422533</ref> <ref>PMID:9546354</ref> <ref>PMID:9892956</ref> <ref>PMID:10873890</ref> <ref>PMID:11251584</ref> <ref>PMID:11328943</ref> Defects in ITGB4 are a cause of generalized atrophic benign epidermolysis bullosa (GABEB) [MIM:[https://omim.org/entry/226650 226650]]. GABEB is a non-lethal, adult form of junctional epidermolysis bullosa characterized by life-long blistering of the skin, associated with hair and tooth abnormalities.<ref>PMID:10792571</ref>
| + | [https://www.uniprot.org/uniprot/ITB4_HUMAN ITB4_HUMAN] Defects in ITGB4 are a cause of epidermolysis bullosa letalis with pyloric atresia (EB-PA) [MIM:[https://omim.org/entry/226730 226730]; also known as junctional epidermolysis bullosa with pyloric atresia (PA-JEB) or aplasia cutis congenita with gastrointestinal atresia. EB-PA is an autosomal recessive, frequently lethal, epidermolysis bullosa with variable involvement of skin, nails, mucosa, and with variable effects on the digestive system. It is characterized by mucocutaneous fragility, aplasia cutis congenita, and gastrointestinal atresia, which most commonly affects the pylorus. Pyloric atresia is a primary manifestation rather than a scarring process secondary to epidermolysis bullosa.<ref>PMID:9792864</ref> <ref>PMID:9422533</ref> <ref>PMID:9546354</ref> <ref>PMID:9892956</ref> <ref>PMID:10873890</ref> <ref>PMID:11251584</ref> <ref>PMID:11328943</ref> Defects in ITGB4 are a cause of generalized atrophic benign epidermolysis bullosa (GABEB) [MIM:[https://omim.org/entry/226650 226650]. GABEB is a non-lethal, adult form of junctional epidermolysis bullosa characterized by life-long blistering of the skin, associated with hair and tooth abnormalities.<ref>PMID:10792571</ref> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/PLEC_HUMAN PLEC_HUMAN]] Interlinks intermediate filaments with microtubules and microfilaments and anchors intermediate filaments to desmosomes or hemidesmosomes. Could also bind muscle proteins such as actin to membrane complexes in muscle. May be involved not only in the filaments network, but also in the regulation of their dynamics. Structural component of muscle. Isoform 9 plays a major role in the maintenance of myofibers integrity.<ref>PMID:12482924</ref> <ref>PMID:21109228</ref> [[https://www.uniprot.org/uniprot/ITB4_HUMAN ITB4_HUMAN]] Integrin alpha-6/beta-4 is a receptor for laminin. Plays a critical structural role in the hemidesmosome of epithelial cells. Is required for the regulation of keratinocyte polarity and motility.<ref>PMID:12482924</ref> <ref>PMID:19403692</ref>
| + | [https://www.uniprot.org/uniprot/ITB4_HUMAN ITB4_HUMAN] Integrin alpha-6/beta-4 is a receptor for laminin. Plays a critical structural role in the hemidesmosome of epithelial cells. Is required for the regulation of keratinocyte polarity and motility.<ref>PMID:12482924</ref> <ref>PMID:19403692</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Human]] | + | [[Category: Homo sapiens]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Pereda, J M.de]] | + | [[Category: De Pereda JM]] |
| - | [[Category: Actin-binding]]
| + | |
| - | [[Category: Alternative splicing]]
| + | |
| - | [[Category: Cell adhesion]]
| + | |
| - | [[Category: Coiled coil]]
| + | |
| - | [[Category: Cytoplasm]]
| + | |
| - | [[Category: Cytoskeleton]]
| + | |
| - | [[Category: Disease mutation]]
| + | |
| - | [[Category: Epidermolysis bullosa]]
| + | |
| - | [[Category: Glycoprotein]]
| + | |
| - | [[Category: Hemidesmosome]]
| + | |
| - | [[Category: Integrin]]
| + | |
| - | [[Category: Membrane]]
| + | |
| - | [[Category: Phosphoprotein]]
| + | |
| - | [[Category: Plakin]]
| + | |
| - | [[Category: Polymorphism]]
| + | |
| - | [[Category: Receptor]]
| + | |
| - | [[Category: Structural protein]]
| + | |
| - | [[Category: Structural protein-cell adhesion complex]]
| + | |
| - | [[Category: Transmembrane]]
| + | |
| Structural highlights
Disease
ITB4_HUMAN Defects in ITGB4 are a cause of epidermolysis bullosa letalis with pyloric atresia (EB-PA) [MIM:226730; also known as junctional epidermolysis bullosa with pyloric atresia (PA-JEB) or aplasia cutis congenita with gastrointestinal atresia. EB-PA is an autosomal recessive, frequently lethal, epidermolysis bullosa with variable involvement of skin, nails, mucosa, and with variable effects on the digestive system. It is characterized by mucocutaneous fragility, aplasia cutis congenita, and gastrointestinal atresia, which most commonly affects the pylorus. Pyloric atresia is a primary manifestation rather than a scarring process secondary to epidermolysis bullosa.[1] [2] [3] [4] [5] [6] [7] Defects in ITGB4 are a cause of generalized atrophic benign epidermolysis bullosa (GABEB) [MIM:226650. GABEB is a non-lethal, adult form of junctional epidermolysis bullosa characterized by life-long blistering of the skin, associated with hair and tooth abnormalities.[8]
Function
ITB4_HUMAN Integrin alpha-6/beta-4 is a receptor for laminin. Plays a critical structural role in the hemidesmosome of epithelial cells. Is required for the regulation of keratinocyte polarity and motility.[9] [10]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The interaction between the integrin alpha6beta4 and plectin is essential for the assembly and stability of hemidesmosomes, which are junctional adhesion complexes that anchor epithelial cells to the basement membrane. We describe the crystal structure at 2.75 A resolution of the primary alpha6beta4-plectin complex, formed by the first pair of fibronectin type III domains and the N-terminal region of the connecting segment of beta4 and the actin-binding domain of plectin. Two missense mutations in beta4 (R1225H and R1281W) linked to nonlethal forms of epidermolysis bullosa prevent essential intermolecular contacts. We also present two structures at 1.75 and 2.05 A resolution of the beta4 moiety in the absence of plectin, which reveal a major rearrangement of the connecting segment of beta4 on binding to plectin. This conformational switch is correlated with the way alpha6beta4 promotes stable adhesion or cell migration and suggests an allosteric control of the integrin.
Structural basis of the interaction between integrin alpha6beta4 and plectin at the hemidesmosomes.,de Pereda JM, Lillo MP, Sonnenberg A EMBO J. 2009 Apr 22;28(8):1180-90. Epub 2009 Feb 26. PMID:19242489[11]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Pulkkinen L, Rouan F, Bruckner-Tuderman L, Wallerstein R, Garzon M, Brown T, Smith L, Carter W, Uitto J. Novel ITGB4 mutations in lethal and nonlethal variants of epidermolysis bullosa with pyloric atresia: missense versus nonsense. Am J Hum Genet. 1998 Nov;63(5):1376-87. PMID:9792864 doi:S0002-9297(07)61568-7
- ↑ Pulkkinen L, Kim DU, Uitto J. Epidermolysis bullosa with pyloric atresia: novel mutations in the beta4 integrin gene (ITGB4). Am J Pathol. 1998 Jan;152(1):157-66. PMID:9422533
- ↑ Pulkkinen L, Bruckner-Tuderman L, August C, Uitto J. Compound heterozygosity for missense (L156P) and nonsense (R554X) mutations in the beta4 integrin gene (ITGB4) underlies mild, nonlethal phenotype of epidermolysis bullosa with pyloric atresia. Am J Pathol. 1998 Apr;152(4):935-41. PMID:9546354
- ↑ Mellerio JE, Pulkkinen L, McMillan JR, Lake BD, Horn HM, Tidman MJ, Harper JI, McGrath JA, Uitto J, Eady RA. Pyloric atresia-junctional epidermolysis bullosa syndrome: mutations in the integrin beta4 gene (ITGB4) in two unrelated patients with mild disease. Br J Dermatol. 1998 Nov;139(5):862-71. PMID:9892956
- ↑ Kambham N, Tanji N, Seigle RL, Markowitz GS, Pulkkinen L, Uitto J, D'Agati VD. Congenital focal segmental glomerulosclerosis associated with beta4 integrin mutation and epidermolysis bullosa. Am J Kidney Dis. 2000 Jul;36(1):190-6. PMID:10873890
- ↑ Ashton GH, Sorelli P, Mellerio JE, Keane FM, Eady RA, McGrath JA. Alpha 6 beta 4 integrin abnormalities in junctional epidermolysis bullosa with pyloric atresia. Br J Dermatol. 2001 Feb;144(2):408-14. PMID:11251584
- ↑ Nakano A, Pulkkinen L, Murrell D, Rico J, Lucky AW, Garzon M, Stevens CA, Robertson S, Pfendner E, Uitto J. Epidermolysis bullosa with congenital pyloric atresia: novel mutations in the beta 4 integrin gene (ITGB4) and genotype/phenotype correlations. Pediatr Res. 2001 May;49(5):618-26. PMID:11328943
- ↑ Inoue M, Tamai K, Shimizu H, Owaribe K, Nakama T, Hashimoto T, McGrath JA. A homozygous missense mutation in the cytoplasmic tail of beta4 integrin, G931D, that disrupts hemidesmosome assembly and underlies Non-Herlitz junctional epidermolysis bullosa without pyloric atresia? J Invest Dermatol. 2000 May;114(5):1061-4. PMID:10792571 doi:10.1046/j.1523-1747.2000.00960-3.x
- ↑ Koster J, Geerts D, Favre B, Borradori L, Sonnenberg A. Analysis of the interactions between BP180, BP230, plectin and the integrin alpha6beta4 important for hemidesmosome assembly. J Cell Sci. 2003 Jan 15;116(Pt 2):387-99. PMID:12482924
- ↑ Hamill KJ, Hopkinson SB, DeBiase P, Jones JC. BPAG1e maintains keratinocyte polarity through beta4 integrin-mediated modulation of Rac1 and cofilin activities. Mol Biol Cell. 2009 Jun;20(12):2954-62. doi: 10.1091/mbc.E09-01-0051. Epub 2009, Apr 29. PMID:19403692 doi:10.1091/mbc.E09-01-0051
- ↑ de Pereda JM, Lillo MP, Sonnenberg A. Structural basis of the interaction between integrin alpha6beta4 and plectin at the hemidesmosomes. EMBO J. 2009 Apr 22;28(8):1180-90. Epub 2009 Feb 26. PMID:19242489 doi:10.1038/emboj.2009.48
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