| Copeptin | |||||||
|---|---|---|---|---|---|---|---|
 Diagram of the pre-pro-vasopressin precursor showing position and size in amino acids of AVP, neurophysin II and copeptin | |||||||
| Identifiers | |||||||
| Symbol | CT-proAVP | ||||||
| Alt. symbols | copeptine | ||||||
| OMIM | 192340 | ||||||
| UniProt | P01185 | ||||||
| Other data | |||||||
| Locus | Chr. 20 p13 | ||||||
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Copeptin (also known as CT-proAVP) is a 39-amino acid-long peptide derived from the C-terminus of pre-pro-hormone of arginine vasopressin, neurophysin II and copeptin. Arginine vasopressin (AVP), also known as the antidiuretic hormone (ADH), is encoded by the AVP gene and is involved in multiple cardiovascular and renal pathways and abnormal level of AVP are associated with various diseases. Hence measurement of AVP would be useful, but is not commonly carried out in clinical practice because of its very short half-life making it difficult to quantify. In contrast, copeptin can be immunologically tested with ease and therefore can be used as a vasopressin surrogate marker.