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Table of Pairwise Domain-Domain Interactions for the domain:

Interacting Domains ↕CD ↕ Accession (External Link)Description ↕
IBBpfam01749Importin beta binding domain. This family consists of the importin alpha (karyopherin alpha), importin beta (karyopherin beta) binding domain. The domain mediates formation of the importin alpha beta complex; required for classical NLS import of proteins into the nucleus, through the nuclear pore complex and across the nuclear envelope. Also in the alignment is the NLS of importin alpha which overlaps with the IBB domain.
Axin_b-cat_bindpfam08833Axin beta-catenin binding domain. This domain is found on the scaffolding protein Axin which is a component of the beta-catenin destruction complex. It competes with the tumour suppressor adenomatous polyposis coli protein (APC) for binding to beta-catenin.
HEATpfam02985HEAT repeat. The HEAT repeat family is related to armadillo/beta-catenin-like repeats (see pfam00514).
CTNNB1_bindingpfam08347N-terminal CTNNB1 binding. This region tends to appear at the N-terminus of proteins also containing DNA-binding HMG (high mobility group) boxes (pfam00505) and appears to bind the armadillo repeat of CTNNB1 (beta-catenin), forming a stable complex. Signaling by Wnt through TCF/LCF is involved in developmental patterning, induction of neural tissues, cell fate decisions and stem cell differentiation. Isoforms of HMG T-cell factors lacking the N-terminal CTNNB1-binding domain cannot fulfill their role as transcriptional activators in T-cell differentiation.
Cadherin_Cpfam01049Cadherin cytoplasmic region. Cadherins are vital in cell-cell adhesion during tissue differentiation. Cadherins are linked to the cytoskeleton by catenins. Catenins bind to the cytoplasmic tail of the cadherin. Cadherins cluster to form foci of homophilic binding units. A key determinant to the strength of the binding that it is mediated by cadherins is the juxtamembrane region of the cadherin. This region induces clustering and also binds to the protein p120ctn.
APC_crrpfam05923APC cysteine-rich region. This short region is found repeated in the mid region of the adenomatous polyposis proteins (APCs). In the human protein many cancer-linked SNPs are found near the first three occurrences of the motif. These repeats bind beta-catenin.
Rb_Cpfam08934Rb C-terminal domain. The Rb C-terminal domain is required for high-affinity binding to E2F-DP complexes and for maximal repression of E2F-responsive promoters, thereby acting as a growth suppressor by blocking the G1-S transition of the cell cycle. This domain has a strand-loop-helix structure, which directly interacts with both E2F1 and DP1, followed by a tail segment that lacks regular secondary structure.
Nucleoplasminpfam03066Nucleoplasmin. Nucleoplasmins are also known as chromatin decondensation proteins. They bind to core histones and transfer DNA to them in a reaction that requires ATP. This is thought to play a role in the assembly of regular nucleosomal arrays.
Scramblasepfam03803Scramblase. Scramblase is palmitoylated and contains a potential protein kinase C phosphorylation site. Scramblase exhibits Ca2+-activated phospholipid scrambling activity in vitro. There are also possible SH3 and WW binding motifs. Scramblase is involved in the redistribution of phospholipids after cell activation or injury.
ICATpfam06384Beta-catenin-interacting protein ICAT. This family consists of several eukaryotic beta-catenin-interacting (ICAT) proteins. Beta-catenin is a multifunctional protein involved in both cell adhesion and transcriptional activation. Transcription mediated by the beta-catenin/Tcf complex is involved in embryological development and is upregulated in various cancers. ICAT selectively inhibits beta-catenin/Tcf binding in vivo, without disrupting beta-catenin/cadherin interactions.
Myc_Npfam01056Myc amino-terminal region. The myc family belongs to the basic helix-loop-helix leucine zipper class of transcription factors, see pfam00010. Myc forms a heterodimer with Max, and this complex regulates cell growth through direct activation of genes involved in cell replication. Mutations in the C-terminal 20 residues of this domain cause unique changes in the induction of apoptosis, transformation, and G2 arrest.
igpfam00047Immunoglobulin domain. Ig: immunoglobulin (Ig) domain found in the Ig superfamily. The Ig superfamily is a heterogenous group of proteins, built on a common fold comprised of a sandwich of two beta sheets. Members of this group are components of immunoglobulin, neuroglia, cell surface glycoproteins, such as, T-cell receptors, CD2, CD4, CD8, and membrane glycoproteins, such as, butyrophilin and chondroitin sulfate proteoglycan core protein. A predominant feature of most Ig domains is a disulfide bridge connecting the two beta-sheets with a tryptophan residue packed against the disulfide bond.
Cse1pfam08506CAS/CSE protein involved in chromosome segregation [Cell division and chromosome partitioning]
APC_15aapfam05972APC 15 residue motif. This motif, known as the 15 aa repeat, is found in the APC protein family. They are involved in binding beta-catenin along with the pfam05923 repeats. Many human cancer mutations map to the region around these motifs, and may be involved in disrupting their binding of beta-catenin.

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