BMH, BH, BLM hydrolase, Bleomycin Hydrolase.
BLMH is affiliate to the papain superfamily of the cysteine protease and the peptidase C1 family. BLMH is a cytoplasmic cysteinepeptidase usually found as a homohexamer. BLMH shields normal and malignant cells from the glycopeptide antitumor drug BLM. BLMH catalyzes the inactivation of the antitumor drug BLM (a glycopeptide) by hydrolyzing the carboxyamide bond of its B-aminoalaninamide moiety and in addition demonstrates general aminopeptidase activity.
BLMH Mouse Recombinant produced in E.Coli is a single, non-glycosylated polypeptide chain containing 478 amino acids (1-455 aa) and having a molecular mass of 54.9 kDa.
BLMH is fused to a 23 amino acid His tag at N-terminus and purified by proprietary chromatographic techniques.
The BLMH solution (0.25 mg/ml) contains 1mM DTT, 30% Glycerol, 20mM Tris-HCl(pH8.0) and 0.1M NaCl.
For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA).
Avoid multiple freeze-thaw cycles.
Greater than 90.0% as determined by SDS-PAGE.
Specific activity is > 1,500 pmole/min/ug. Measured by hydrolysis of 1pmole of Met-AMC to Methionine and AMC per minute at pH7.5 at 37C˚.
Amino acid sequence
MGSSHHHHHH SSGLVPRGSH MGSMNNAGLN SEKVSALIQK LNSDPQFVLA QNVGTTHDLL
DICLRRATVQ GAQHVFQHVV PQEGKPVTNQ KSSGRCWIFS CLNVMRLPFM KKFNIEEFEF
SQSYLFFWDK VERCYFFLNA FVDTAQKKEP EDGRLVQYLL MNPTNDGGQW DMLVNIVEKY
GVVPKKCFPE SHTTEATRRM NDILNHKMRE FCIRLRNLVH SGATKGEISS TQDAMMEEIF
RVVCICLGNP PETFTWEYRD KDKNYHKIGP ITPLQFYKEH VKPLFNMEDK ICFVNDPRPQ
HKYNKLYTVD YLSNMVGGRK TLYNNQPIDF LKKMVAASIK DGEAVWFGCD VGKHFNGKLG
LSDMNVYDHE LVFGVSLKNM NKAERLAFGE SLMTHAMTFT AVSEKDNQEG TFVKWRVENS
WGEDHGHKGY LCMTDEWFSE YVYEVVVDKK HVPEEVLAVL EQEPIVLPAW DPMGALAE