Monomer and homodimer; the monomer preferentially binds to CTNNB1 and the homodimer to actin. Binds MLLT4 and F-actin. Possible component of an E-cadherin/ catenin adhesion complex together with E-cadherin/CDH1 and beta-catenin/CTNNB1 or gamma-catenin/JUP; the complex is located to adherens junctions. The stable association of CTNNA1 is controversial as CTNNA1 was shown not to bind to F-actin when assembled in the complex. Alternatively, the CTNNA1-containing complex may be linked to F-actin by other proteins such as LIMA1. Interacts with ARHGAP21 and with JUB. Interacts with LIMA1.
Function:
Associates with the cytoplasmic domain of a variety of cadherins. The association of catenins to cadherins produces a complex which is linked to the actin filament network, and which seems to be of primary importance for cadherins cell-adhesion properties. Can associate with both E- and N-cadherins. Originally believed to be a stable component of E-cadherin/catenin adhesion complexes and to mediate the linkage of cadherins to the actin cytoskeleton at adherens junctions. In contrast, cortical actin was found to be much more dynamic than E-cadherin/catenin complexes and CTNNA1 was shown not to bind to F-actin when assembled in the complex suggesting a different linkage between actin and adherence junctions components. The homodimeric form may regulate actin filament assembly and inhibit actin branching by competing with the Arp2/3 complex for binding to actin filaments. May play a crucial role in cell differentiation.
Subcellular Location:
Cytoplasm
cytoskeleton
Cell junction
adherens junction
Cell membrane
Peripheral membrane protein
Cytoplasmic side
Cell junction
Found at cell-cell boundaries and probably at cell-matrix boundaries.
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Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 3);ALTERNATIVE SPLICING;SUBCELLULAR LOCATION (ISOFORM 3)
"Genomic organization of the human alphaE-catenin gene (CTNNA1)." Nollet F.H.
,
Vanpoucke G.G.
,
van Roy F.M.
Submitted (1998-10) to the EMBL/GenBank/DDBJ databases
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Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]
6.
NIEHS SNPs program
Submitted (2005-01) to the EMBL/GenBank/DDBJ databases
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Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA];VARIANTS VAL-179 AND SER-219
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Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORMS 1 AND 3)
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Cited for: PROTEIN SEQUENCE OF 2-12; 166-178 AND 617-623;CLEAVAGE OF INITIATOR METHIONINE;ACETYLATION AT THR-2;IDENTIFICATION BY MASS SPECTROMETRY
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Cited for: IDENTIFICATION IN AN E-CADHERIN/CATENIN ADHESION COMPLEX
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Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-641;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
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Cited for: IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
[15/1/25 17:38] Upload to ab completed in less than a minute: 1 file transferred (13.4 Kb/s)
Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-641;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
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Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT THR-645 AND SER-652;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
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Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-641;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
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Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-641 AND SER-652;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
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Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-641 AND THR-645;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
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Cited for: IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
[15/1/25 17:38] Upload to ab completed in less than a minute: 1 file transferred (13.4 Kb/s)
Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-641;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
[15/1/25 17:38] Upload to ab completed in less than a minute: 1 file transferred (13.4 Kb/s)
Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-641;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
[15/1/25 17:38] Upload to ab completed in less than a minute: 1 file transferred (13.4 Kb/s)
Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-641;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
[15/1/25 17:38] Upload to ab completed in less than a minute: 1 file transferred (13.4 Kb/s)
Cited for: IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
[15/1/25 17:38] Upload to ab completed in less than a minute: 1 file transferred (13.4 Kb/s)
Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT THR-634; SER-641 AND SER-652;IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]
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Cited for: X-RAY CRYSTALLOGRAPHY (2.2 ANGSTROMS) OF 377-632;PARTIAL PROTEIN SEQUENCE;IDENTIFICATION BY MASS SPECTROMETRY