:Envelysin

{{Short description|Class of enzymes}}

{{Infobox enzyme

| Name = Envelysin

| EC_number = 3.4.24.12

| CAS_number = 50812-13-0

| GO_code =

| image =

| width =

| caption =

}}

Envelysin ({{EC number|3.4.24.12}}, sea-urchin-hatching proteinase, hatching enzyme, chorionase, chorion-digesting proteinase, chymostrypsin, sea urchin embryo hatching enzyme) is an enzyme.{{cite book | vauthors = Barrett D, Edwards BF | chapter = Hatching enzyme of the sea urchin Strongylocentrotus purpuratus | title = Part B: Proteolytic Enzymes | series = Methods in Enzymology | volume = 45 | pages = 354–73 | year = 1976 | pmid = 1012003 | doi = 10.1016/s0076-6879(76)45032-2 | isbn = 978-0-12-181945-3 }}{{cite journal | vauthors = Lepage T, Gache C | title = Purification and characterization of the sea urchin embryo hatching enzyme | journal = The Journal of Biological Chemistry | volume = 264 | issue = 9 | pages = 4787–93 | date = March 1989 | doi = 10.1016/S0021-9258(18)83659-6 | pmid = 2925668 | doi-access = free }}{{cite journal | vauthors = Lepage T, Gache C | title = Early expression of a collagenase-like hatching enzyme gene in the sea urchin embryo | journal = The EMBO Journal | volume = 9 | issue = 9 | pages = 3003–12 | date = September 1990 | doi = 10.1002/j.1460-2075.1990.tb07493.x | pmid = 2167841 | pmc = 552018 }}{{cite journal | vauthors = Nomura K, Tanaka H, Kikkawa Y, Yamaguchi M, Suzuki N | title = The specificity of sea urchin hatching enzyme (envelysin) places it in the mammalian matrix metalloproteinase family | journal = Biochemistry | volume = 30 | issue = 25 | pages = 6115–23 | date = June 1991 | pmid = 1711895 | doi = 10.1021/bi00239a005 }} This enzyme catalyses the following chemical reaction

: Hydrolysis of proteins of the fertilization envelope and dimethylcasein

This enzyme is a glycoprotein from various members of the class Echinoidea.