In enzymology, an adenosylcobinamide hydrolase (EC 3.5.1.90) is an enzyme that catalyzes the chemical reaction

adenosylcobinamide + H₂O ${\displaystyle \rightleftharpoons }$ adenosylcobyric acid + (R)-1-aminopropan-2-ol

Thus, the two substrates of this enzyme are adenosylcobinamide and H₂O, whereas its two products are adenosylcobyric acid and (R)-1-aminopropan-2-ol.

This enzyme belongs to the family of hydrolases, those acting on carbon-nitrogen bonds other than peptide bonds, specifically in linear amides. The systematic name of this enzyme class is adenosylcobinamide amidohydrolase. Other names in common use include CbiZ, and AdoCbi amidohydrolase. This enzyme participates in porphyrin and chlorophyll metabolism.

• Woodson JD, Escalante-Semerena JC (2004). "CbiZ, an amidohydrolase enzyme required for salvaging the coenzyme B12 precursor cobinamide in archaea". Proc. Natl. Acad. Sci. U.S.A. 101 (10): 3591–6. Bibcode:2004PNAS..101.3591W. doi:10.1073/pnas.0305939101. PMC 373507. PMID 14990804.