Protocadherin-19 (IPR030716)

Short name: Protocadherin-19

Overlapping homologous superfamilies


Family relationships



Protocadherin-19 (Pcdh19) belongs to the delta-2 subfamily of nonclustered protocadherins. The non-clustered PCDHs appear to have homophilic/heterophilc cell-cell adhesion properties [PMID: 21173574], and the delta-2 subfamily (comprising protocadherin-8, -10, -17, -18, and -19) is widely expressed in the nervous system [PMID: 25612302, PMID: 15905963]. Pcdh19 is highly expressed during brain development, and could play significant roles in neuronal migration or establishment of synaptic connections. Pcdh19 mutations cause an unusual X-linked inheritance disorder resulting in epilepsy and mental retardation [PMID: 22267240, PMID: 22504056, PMID: 25204757].

The cadherin family consists of a large group of cell adhesion proteins. It can be classified into three subfamilies: classical cadherins, desmosomal cadherins and protocadherins (PCDHs). Based on the genomic structure, the PCDH family can be divided into two groups, clustered PCDHs and non-clustered PCDHs. Non-clustered PCDHs can be further classified into three subgroups: delta1 (PCDH1, PCDH7, PCDH9, PCDH11 and PCDH20), delta2 (PCDH8, PCDH10, PCDH12, PCDH17, PCDH18 and PCDH19) and epsilon (PCDH15, PCDH16, PCDH21 and MUCDHL). Non-clustered PCDHs are expressed predominantly in the nervous system and have spatiotemporally diverse expression patterns [PMID: 21173574].

GO terms

Biological Process

GO:0007420 brain development
GO:0007155 cell adhesion

Molecular Function

No terms assigned in this category.

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.