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  3. ITGA7

ITGA7 (Integrin subunit alpha 7)

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Summary of ITGA7

The gene codes for a protein, integrin subunit alpha 7. Defects are linked to congenital myopathy [R].

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The Function of ITGA7

Integrin alpha-7/beta-1 is the primary laminin receptor on skeletal myoblasts and adult myofibers. During myogenic differentiation, it may induce changes in the shape and mobility of myoblasts, and facilitate their localization at laminin-rich sites of secondary fiber formation. It is involved in the maintenance of the myofibers cytoarchitecture as well as for their anchorage, viability and functional integrity. Isoform Alpha-7X2B and isoform Alpha-7X1B promote myoblast migration on laminin 1 and laminin 2/4, but isoform Alpha-7X1B is less active on laminin 1 (In vitro). Acts as Schwann cell receptor for laminin-2. Acts as a receptor of COMP and mediates its effect on vascular smooth muscle cells (VSMCs) maturation (By similarity). Required to promote contractile phenotype acquisition in differentiated airway smooth muscle (ASM) cells.

Protein names

Recommended name:

Integrin alpha-7 [Cleaved into: Integrin alpha-7 heavy chain; Integrin alpha-7 light chain; Integrin alpha-7 70 kDa form]

ITGA7 SNPs

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  1. RS1800974 (ITGA7) ??

Top Gene-Substance Interactions

Substances That Increase ITGA7

Substances Interaction Organism Category

Substances That Decrease ITGA7

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Advanced Summary

     From NCBI Gene: Muscular dystrophy, congenital, due to integrin alpha-7 deficiencyFrom UniProt: Muscular dystrophy congenital due to integrin alpha-7 deficiency (MDCI): A form of congenital muscular dystrophy. Patients present at birth, or within the first few months of life, with hypotonia, muscle weakness and often with joint contractures. [MIM:613204]

     From NCBI Gene: The protein encoded by this gene belongs to the integrin alpha chain family. Integrins are heterodimeric integral membrane proteins composed of an alpha chain and a beta chain. They mediate a wide spectrum of cell-cell and cell-matrix interactions, and thus play a role in cell migration, morphologic development, differentiation, and metastasis. This protein functions as a receptor for the basement membrane protein laminin-1. It is mainly expressed in skeletal and cardiac muscles and may be involved in differentiation and migration processes during myogenesis. Defects in this gene are associated with congenital myopathy. Alternatively spliced transcript variants encoding different isoforms have been noted for this gene. [provided by RefSeq, Feb 2009] From UniProt: Integrin alpha-7/beta-1 is the primary laminin receptor on skeletal myoblasts and adult myofibers. During myogenic differentiation, it may induce changes in the shape and mobility of myoblasts, and facilitate their localization at laminin-rich sites of secondary fiber formation. It is involved in the maintenance of the myofibers cytoarchitecture as well as for their anchorage, viability and functional integrity. Isoform Alpha-7X2B and isoform Alpha-7X1B promote myoblast migration on laminin 1 and laminin 2/4, but isoform Alpha-7X1B is less active on laminin 1 (In vitro). Acts as Schwann cell receptor for laminin-2. Acts as a receptor of COMP and mediates its effect on vascular smooth muscle cells (VSMCs) maturation (By similarity). Required to promote contractile phenotype acquisition in differentiated airway smooth muscle (ASM) cells.

Conditions with Increased Gene Activity

Condition Change (log2fold) Comparison Species Experimental variables Experiment name

Conditions with Decreased Gene Activity

Condition Change (log2fold) Comparison Species Experimental variables Experiment name

Technical

The following transcription factors affect gene expression:

  • CUTL1
  • Arnt
  • C/EBPbeta
  • c-Myc
  • SREBP-1a
  • SREBP-1c
  • SREBP-1b
  • Nkx5-1
  • LCR-F1

Tissue specificity:

Isoforms containing segment A are predominantly expressed in skeletal muscle. Isoforms containing segment B are abundantly expressed in skeletal muscle, moderately in cardiac muscle, small intestine, colon, ovary and prostate and weakly in lung and testes. Isoforms containing segment X2D are expressed at low levels in fetal and adult skeletal muscle and in cardiac muscle, but are not detected in myoblasts and myotubes. In muscle fibers isoforms containing segment A and B are expressed at myotendinous and neuromuscular junctions; isoforms containing segment C are expressed at neuromuscular junctions and at extrasynaptic sites. Isoforms containing segments X1 or X2 or, at low levels, X1X2 are expressed in fetal and adult skeletal muscle (myoblasts and myotubes) and cardiac muscle.

Gene Pathways:

  • Regulation of actin cytoskeleton
  • Arrhythmogenic right ventricular cardiomyopathy (ARVC)
  • Extracellular matrix organization
  • Dilated cardiomyopathy
  • Hypertrophic cardiomyopathy (HCM)

Developmental stage:

In renewing intestinal epithelium, expression of isoforms containing segment B correlates with the onset of enterocytic differentiation.

Molecular Function:

  • Metal Ion Binding

Biological Processes:

  • Cell-Matrix Adhesion
  • Endodermal Cell Differentiation
  • Extracellular Matrix Organization
  • Heterotypic Cell-Cell Adhesion
  • Integrin-Mediated Signaling Pathway
  • Muscle Organ Development
  • Regulation Of Cell Shape
*synonyms

Synonyms/Aliases/Alternative Names of the Gene:

hypothetical protein| alpha7| [a]7| alpha 7A integrin| D623_10009142| H36-alpha7| H920_14082| I79_013526| integrin, alpha 3 (antigen CD49C, alpha 3 subunit of VLA-3 receptor)| integrin, alpha 3 (antigen CD49C, alpha 3 subunit of VLA-3 receptor) isoform A| integrin, alpha 3 (antigen CD49C, alpha 3 subunit of VLA-3 receptor) isoform B| integrin, alpha 3 (antigen CD49C, alpha 3 subunit of VLA-3 receptor) isoform C| integrin alpha 7| integrin alpha-7| integrin, alpha 7| integrin alpha 7 chain| integrin alpha-7-like protein| ITGA3| PAL_GLEAN10004789| TREES_T100006924| Y1Q_001538| itga7

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