| N-ethylmaleimide-sensitive factor attachment protein, alpha | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||||||
| Symbols | NAPA; SNAPA | ||||||||||||
| External IDs | OMIM: 603215 MGI: 104563 HomoloGene: 124419 GeneCards: NAPA Gene | ||||||||||||
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| RNA expression pattern | |||||||||||||
| More reference expression data | |||||||||||||
| Orthologs | |||||||||||||
| Species | Human | Mouse | |||||||||||
| Entrez | 8775 | 108124 | |||||||||||
| Ensembl | ENSG00000105402 | ENSMUSG00000006024 | |||||||||||
| UniProt | P54920 | Q9CXX1 | |||||||||||
| RefSeq (mRNA) | NM_003827.3 | NM_025898.3 | |||||||||||
| RefSeq (protein) | NP_003818 | NP_080174.1 | |||||||||||
| Location (UCSC) | Chr 19: 47.99 – 48.02 Mb |
Chr 7: 16.68 – 16.7 Mb |
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| PubMed search | [1] | [2] | |||||||||||
N-ethylmaleimide-sensitive factor attachment protein, alpha, also known as NAPA or alpha-SNAP,[1] is a human gene.[2]
It is abnormally expressed in fetuses of both IVF and ICSI, which may contribute to the increase risk of birth defects in these ART.[3]
The 'SNARE hypothesis' is a model explaining the process of docking and fusion of vesicles to their target membranes. According to this model, membrane proteins from the vesicle (v-SNAREs) and proteins from the target membrane (t-SNAREs) govern the specificity of vesicle targeting and docking through mutual recognition. Once the 2 classes of SNAREs bind to each other, they form a complex that recruits the general elements of the fusion apparatus, namely NSF (N-ethylmaleimide-sensitive factor) and SNAPs (soluble NSF-attachment proteins), to the site of membrane fusion, thereby forming the 20S fusion complex. Alpha- and gamma-SNAP are found in a wide range of tissues and act synergistically in intra-Golgi transport. The sequence of the predicted 295-amino acid human protein encoded by NAPA shares 37%, 60%, and 67% identity with the sequences of yeast, Drosophila, and squid alpha-SNAP, respectively. Platelets contain some of the same proteins, including NSF, p115/TAP, alpha-SNAP, gamma-SNAP, and the t-SNAREs syntaxin-2 and syntaxin-4, that are used in many vesicular transport processes in other cell types. Platelet exocytosis uses a molecular mechanism similar to that used by other secretory cells, such as neurons, although the proteins used by the platelet and their modes of regulation may be quite different.[2]
NAPA (gene) has been shown to interact with STX4,[4] SNAP23,[4] STX1A,[5][6] N-ethylmaleimide sensitive fusion protein[6][7] and STX5.[4][8]
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