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1NOW

Human lysosomal beta-hexosaminidase isoform B in complex with (2R,3R,4S,5R)-2-Acetamido-3,4-Dihydroxy-5-Hydroxymethyl-Piperidinium Chloride (GalNAc-isofagomine)

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A, B
(A, B)
beta-hexosaminidase beta chainpolymer50758184.92UniProt (p07686)
Pfam (PF14845)
Pfam (PF00728)
UniProt (by SIFTS) (P07686)
Homo sapiens (human)N-ACETYL-BETA-GLUCOSAMINIDASE, BETA-N-ACETYLHEXOSAMINIDASE, HEXOSAMINIDASE B
2C, D
(C, D)
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranosebranched424.42In PDB
GlyTouCan (G42666HT)
3E, I
(A, B)
(2R,3R,4S,5R)-2-ACETAMIDO-3,4-DIHYDROXY-5-HYDROXYMETHYL-PIPERIDINEnon-polymer204.22Chemie (IFG)
4F, G, J
(A, B)
GLYCEROLnon-polymer92.13Chemie (GOL)
5H
(B)
SULFATE IONnon-polymer96.11Chemie (SO4)
6K, L
(A, B)
waterwater18.0321Chemie (HOH)
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains2
Total formula weight116369.8
BranchedNumber of molecules2
Total formula weight848.8
Non-Polymers*Number of molecules6
Total formula weight780.8
All*Total formula weight117999.4
*Water molecules are not included.

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PDB entries from 2025-12-10

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