Exact Mass: 1635.6481
Exact Mass Matches: 1635.6481
Found 4 metabolites which its exact mass value is equals to given mass value 1635.6481,
within given mass tolerance error 0.05 dalton. Try search metabolite list with more accurate mass tolerance error
0.01 dalton.
Glutathionylcobalamin
Potentially one of the biologically important forms of Vitamin B12; formed rapidly from aquacobalamin [HMDB] Potentially one of the biologically important forms of Vitamin B12; formed rapidly from aquacobalamin;.
Aquacobalamin
Aquacobalamin is one of the major forms of vitamin B(12) isolated from mammalian cells. Aquacobalamin and the thiolate forms of glutathione are the precursors of glutathionylcobalamin (GSCbl, a precursor to the formation of the two coenzyme forms of vitamin B(12), adenosylcobalamin and methylcobalamin) in mammalian cells. Under biological conditions the formation of GSCbl from aquacobalamin and glutathione is essentially irreversible; upon entering cells, any free (protein-unbound) aquacobalamin could be rapidly and irreversibly converted to GSCbl. (PMID: 15476387). Aquacobalamin is reduced to cob(II)alamin by Methionine synthase reductse (MSR) in the presence of NADPH, and this reduction leads to stimulation of the conversion of apomethionine synthase and aquacobalamin to methionine synthase holoenzyme. MSR serves as a special chaperone for human methionine synthase and as an aquacobalamin reductase, rather than acting solely in the reductive activation of methionine synthase. (PMID: 16769880). Aquacobalamin is one of the major forms of vitamin B(12) isolated from mammalian cells. Aquacobalamin and the thiolate forms of glutathione are the precursors of glutathionylcobalamin (GSCbl, a precursor to the formation of the two coenzyme forms of vitamin B(12), adenosylcobalamin and methylcobalamin) in mammalian cells. Under biological conditions the formation of GSCbl from aquacobalamin and glutathione is essentially irreversible; upon entering cells, any free (protein-unbound) aquacobalamin could be rapidly and irreversibly converted to GSCbl. (PMID: 15476387)