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This is the Wikipedia entry entitled "Involucrin". More...
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Involucrin Edit Wikipedia article
|Involucrin of squamous epithelia N-terminus|
|SCOPe||1eu0 / SUPFAM|
Involucrin is a protein component of human skin and in humans is encoded by the IVL gene. In binding the protein loricrin, involucrin contributes to the formation of a cell envelope that protects corneocytes in the skin.
Involucrin is a highly reactive, soluble, transglutaminase substrate protein present in keratinocytes of epidermis and other stratified squamous epithelia. It first appears in the cell cytosol, but ultimately becomes cross-linked to membrane proteins by transglutaminase thus helping in the formation of an insoluble envelope beneath the plasma membrane functioning as a glutamyl donor during assembly of the cornified envelope.
Involucrin is synthesised in the stratum spinosum and cross linked in the stratum granulosum by the transglutaminase enzyme that makes it highly stable. Thus it provides structural support to the cell, thereby allowing the cell to resist invasion by micro-organisms.
Apigenin, a plant-derived flavanoid that has significant promise as a skin cancer chemopreventive agent, has been found to regulate normal human keratinocyte differentiation by suppressing involucrin, and this is associated with reduced cell proliferation without apoptosis.
Lamellar ichthyosis involves a decrease in expression of involucrin. This decrease could contribute to the altered desquamation process seen in the disease, since the clinical improvement associated with retinoid treatment is accompanied by increased expression of involucrin.
Involucrin consists of a conserved N-terminal region of about 75 amino acid residues followed by two extremely variable length segments that contain glutamine-rich tandem repeats. The glutamine residues in the tandem repeats are the substrate for the transglutaminase in the cross-linking reaction. The total size of the protein varies from 285 residues (in dog) to 835 residues (in orangutan).
- GRCh38: Ensembl release 89: ENSG00000163207 - Ensembl, May 2017
- "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
- Eckert RL, Green H (August 1986). "Structure and evolution of the human involucrin gene". Cell. 46 (4): 583â€“9. doi:10.1016/0092-8674(86)90884-6. PMID 2873896.
- "Entrez Gene: IVL involucrin".
- Green H, Djian P (November 1992). "Consecutive actions of different gene-altering mechanisms in the evolution of involucrin". Molecular Biology and Evolution. 9 (6): 977â€“1017. PMID 1359382.
- Djian P, Phillips M, Easley K, Huang E, Simon M, Rice RH, Green H (November 1993). "The involucrin genes of the mouse and the rat: study of their shared repeats". Molecular Biology and Evolution. 10 (6): 1136â€“49. PMID 8277848.
- Eckert RL, Yaffe MB, Crish JF, Murthy S, Rorke EA, Welter JF (May 1993). "Involucrin--structure and role in envelope assembly". The Journal of Investigative Dermatology. 100 (5): 613â€“7. doi:10.1111/1523-1747.ep12472288. PMID 8098344.
- Balasubramanian S, Zhu L, Eckert RL (November 2006). "Apigenin inhibition of involucrin gene expression is associated with a specific reduction in phosphorylation of protein kinase Cdelta Tyr311". The Journal of Biological Chemistry. 281 (47): 36162â€“72. doi:10.1074/jbc.M605368200. PMID 16982614.
- Takahashi H, Hashimoto Y, Ishida-Yamamoto A, Iizuka H (September 2005). "Roxithromycin suppresses involucrin expression by modulation of activator protein-1 and nuclear factor-kappaB activities of keratinocytes". Journal of Dermatological Science. 39 (3): 175â€“82. doi:10.1016/j.jdermsci.2005.03.006. PMID 16140218.
- PeÃ±a-Penabad C, de Unamuno P, GarcÃa Silva J, LudeÃ±a MD, GonzÃ¡lez Sarmiento R, PÃ©rez-Arellano JL (1999). "Altered expression of immunoreactive involucrin in lamellar ichthyosis". European Journal of Dermatology. 9 (3): 197â€“201. PMID 10210784.
- Eckert RL, Crish JF, Efimova T, Dashti SR, Deucher A, Bone F, Adhikary G, Huang G, Gopalakrishnan R, Balasubramanian S (July 2004). "Regulation of involucrin gene expression". The Journal of Investigative Dermatology. 123 (1): 13â€“22. doi:10.1111/j.0022-202X.2004.22723.x. PMID 15191537.
- Rice RH, Green H (November 1979). "Presence in human epidermal cells of a soluble protein precursor of the cross-linked envelope: activation of the cross-linking by calcium ions". Cell. 18 (3): 681â€“94. doi:10.1016/0092-8674(79)90123-5. PMID 42494.
- Yaffe MB, Beegen H, Eckert RL (June 1992). "Biophysical characterization of involucrin reveals a molecule ideally suited to function as an intermolecular cross-bridge of the keratinocyte cornified envelope". The Journal of Biological Chemistry. 267 (17): 12233â€“8. PMID 1601889.
- Simon M, Green H (December 1988). "The glutamine residues reactive in transglutaminase-catalyzed cross-linking of involucrin". The Journal of Biological Chemistry. 263 (34): 18093â€“8. PMID 2461365.
- Heller M, Flemington E, Kieff E, Deininger P (March 1985). "Repeat arrays in cellular DNA related to the Epstein-Barr virus IR3 repeat". Molecular and Cellular Biology. 5 (3): 457â€“65. doi:10.1128/mcb.5.3.457. PMC 366737. PMID 2985954.
- Welter JF, Crish JF, Agarwal C, Eckert RL (May 1995). "Fos-related antigen (Fra-1), junB, and junD activate human involucrin promoter transcription by binding to proximal and distal AP1 sites to mediate phorbol ester effects on promoter activity". The Journal of Biological Chemistry. 270 (21): 12614â€“22. doi:10.1074/jbc.270.21.12614. PMID 7759510.
- Volz A, Korge BP, Compton JG, Ziegler A, Steinert PM, Mischke D (October 1993). "Physical mapping of a functional cluster of epidermal differentiation genes on chromosome 1q21". Genomics. 18 (1): 92â€“9. doi:10.1006/geno.1993.1430. PMID 8276421.
- Takahashi H, Iizuka H (January 1993). "Analysis of the 5'-upstream promoter region of human involucrin gene: activation by 12-O-tetradecanoylphorbol-13-acetate". The Journal of Investigative Dermatology. 100 (1): 10â€“5. doi:10.1111/1523-1747.ep12349867. PMID 8380829.
- Lopez-Bayghen E, Vega A, Cadena A, Granados SE, Jave LF, Gariglio P, Alvarez-Salas LM (January 1996). "Transcriptional analysis of the 5'-noncoding region of the human involucrin gene". The Journal of Biological Chemistry. 271 (1): 512â€“20. doi:10.1074/jbc.271.1.512. PMID 8550612.
- Takahashi H, Kobayashi H, Matsuo S, Iizuka H (1995). "Repression of involucrin gene expression by transcriptional enhancer factor 1 (TEF-1)". Archives of Dermatological Research. 287 (8): 740â€“6. doi:10.1007/BF01105799. PMID 8554386.
- Steinert PM, Marekov LN (January 1997). "Direct evidence that involucrin is a major early isopeptide cross-linked component of the keratinocyte cornified cell envelope". The Journal of Biological Chemistry. 272 (3): 2021â€“30. doi:10.1074/jbc.272.3.2021. PMID 8999895.
- Robinson NA, Lapic S, Welter JF, Eckert RL (May 1997). "S100A11, S100A10, annexin I, desmosomal proteins, small proline-rich proteins, plasminogen activator inhibitor-2, and involucrin are components of the cornified envelope of cultured human epidermal keratinocytes". The Journal of Biological Chemistry. 272 (18): 12035â€“46. doi:10.1074/jbc.272.18.12035. PMID 9115270.
- Ng DC, Su MJ, Kim R, Bikle DD (January 1996). "Regulation of involucrin gene expression by calcium in normal human keratinocytes". Frontiers in Bioscience. 1: a16â€“24. doi:10.2741/A101. PMID 9159190.
- Banks EB, Crish JF, Welter JF, Eckert RL (April 1998). "Characterization of human involucrin promoter distal regulatory region transcriptional activator elements-a role for Sp1 and AP1 binding sites". The Biochemical Journal. 331 (1): 61â€“8. doi:10.1042/bj3310061. PMC 1219321. PMID 9512462.
- Marekov LN, Steinert PM (July 1998). "Ceramides are bound to structural proteins of the human foreskin epidermal cornified cell envelope". The Journal of Biological Chemistry. 273 (28): 17763â€“70. doi:10.1074/jbc.273.28.17763. PMID 9651377.
- Crish JF, Zaim TM, Eckert RL (November 1998). "The distal regulatory region of the human involucrin promoter is required for expression in epidermis". The Journal of Biological Chemistry. 273 (46): 30460â€“5. doi:10.1074/jbc.273.46.30460. PMID 9804813.
- Lee CH, Marekov LN, Kim S, Brahim JS, Park MH, Steinert PM (July 2000). "Small proline-rich protein 1 is the major component of the cell envelope of normal human oral keratinocytes". FEBS Letters. 477 (3): 268â€“72. doi:10.1016/S0014-5793(00)01806-8. PMID 10908733.
- Candi E, Oddi S, Terrinoni A, Paradisi A, Ranalli M, Finazzi-AgrÃ³ A, Melino G (September 2001). "Transglutaminase 5 cross-links loricrin, involucrin, and small proline-rich proteins in vitro". The Journal of Biological Chemistry. 276 (37): 35014â€“23. doi:10.1074/jbc.M010157200. PMID 11443109.
- Crish JF, Bone F, Banks EB, Eckert RL (January 2002). "The human involucrin gene contains spatially distinct regulatory elements that regulate expression during early versus late epidermal differentiation". Oncogene. 21 (5): 738â€“47. doi:10.1038/sj.onc.1205038. PMID 11850802.
This tab holds the annotation information that is stored in the Pfam database. As we move to using Wikipedia as our main source of annotation, the contents of this tab will be gradually replaced by the Wikipedia tab.
Involucrin Provide feedback
This family represents a conserved region approximately 60 residues long, multiple copies of which are found within eukaryotic involucrin, and which is rich in glutamine and glutamic acid residues. Involucrin forms part of the insoluble cornified cell envelope (a specialised protective barrier) of stratified squamous epithelia . Members of this family seem to be restricted to mammals.
This tab holds annotation information from the InterPro database.
InterPro entry IPR009733
This domain represents a conserved region approximately 60 residues long, multiple copies of which are found within eukaryotic involucrin, and which is rich in glutamine and glutamic acid residues. Involucrin forms part of the insoluble cornified cell envelope (a specialised protective barrier) of stratified squamous epithelia [ PUBMED:12210515 ].
The mapping between Pfam and Gene Ontology is provided by InterPro. If you use this data please cite InterPro.
|Cellular component||cornified envelope (GO:0001533)|
|Biological process||keratinocyte differentiation (GO:0030216)|
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1Cannot generate PP/Heatmap alignments for seeds; no PP data available
Key: available, not generated, — not available.
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We make all of our alignments available in Stockholm format. You can download them here as raw, plain text files or as gzip-compressed files.
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This page displays the phylogenetic tree for this family's seed alignment. We use FastTree to calculate neighbour join trees with a local bootstrap based on 100 resamples (shown next to the tree nodes). FastTree calculates approximately-maximum-likelihood phylogenetic trees from our seed alignment.
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|Seed source:||Pfam-B_8443 (release 10.0)|
|Author:||Vella Briffa B|
|Number in seed:||17|
|Number in full:||155|
|Average length of the domain:||37.90 aa|
|Average identity of full alignment:||49 %|
|Average coverage of the sequence by the domain:||49.78 %|
|HMM build commands:||
build method: hmmbuild -o /dev/null HMM SEED
search method: hmmsearch -Z 57096847 -E 1000 --cpu 4 HMM pfamseq
|Family (HMM) version:||13|
|Download:||download the raw HMM for this family|
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This visualisation provides a simple graphical representation of the distribution of this family across species. You can find the original interactive tree in the More....
This chart is a modified "sunburst" visualisation of the species tree for this family. It shows each node in the tree as a separate arc, arranged radially with the superkingdoms at the centre and the species arrayed around the outermost ring.
How the sunburst is generated
The tree is built by considering the taxonomic lineage of each sequence that has a match to this family. For each node in the resulting tree, we draw an arc in the sunburst. The radius of the arc, its distance from the root node at the centre of the sunburst, shows the taxonomic level ("superkingdom", "kingdom", etc). The length of the arc represents either the number of sequences represented at a given level, or the number of species that are found beneath the node in the tree. The weighting scheme can be changed using the sunburst controls.
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Unmapped species names
The tree is built by looking at each sequence in the full alignment for the family. We take the name of the species given by UniProt and try to map that to the full taxonomic tree from NCBI. In some cases, the name chosen by UniProt does not map to any node in the NCBI tree, perhaps because the chosen name is listed as a synonym or a misspelling in the NCBI taxonomy.
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Since we reduce the species tree to only the eight main taxonomic levels, sequences that are mapped to the sub-species level in the tree would not normally be shown. Rather than leave out these species, we map them instead to their parent species. So, for example, for sequences belonging to one of the Vibrio cholerae sub-species in the NCBI taxonomy, we show them instead as belonging to the species Vibrio cholerae.
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The tree shows the occurrence of this domain across different species. More...
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For all of the domain matches in a full alignment, we count the number that are found on all sequences in the alignment. This total is shown in the purple box.
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We use the NCBI species tree to group organisms according to their taxonomy and this forms the structure of the displayed tree. Note that in some cases the trees are too large (have too many nodes) to allow us to build an interactive tree, but in most cases you can still view the tree in a plain text, non-interactive representation. Those species which are represented in the seed alignment for this domain are highlighted.
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AlphaFold Structure Predictions
The list of proteins below match this family and have AlphaFold predicted structures. Click on the protein accession to view the predicted structure.
The structural model below was generated by the Baker group with the trRosetta software using the Pfam UniProt multiple sequence alignment.
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