Identification
HMDB Protein ID CDBP00812
Secondary Accession Numbers Not Available
Name Endoplasmic reticulum mannosyl-oligosaccharide 1,2-alpha-mannosidase
Description Not Available
Synonyms
  1. ER alpha-1,2-mannosidase
  2. ER mannosidase 1
  3. ERMan1
  4. Man9GlcNAc2-specific-processing alpha-mannosidase
  5. Mannosidase alpha class 1B member 1
Gene Name MAN1B1
Protein Type Enzyme
Biological Properties
General Function Involved in mannosyl-oligosaccharide 1,2-alpha-mannosidase activity
Specific Function Involved in glycoprotein quality control targeting of misfolded glycoproteins for degradation. It primarily trims a single alpha-1,2-linked mannose residue from Man(9)GlcNAc(2) to produce Man(8)GlcNAc(2), but at high enzyme concentrations, as found in the ER quality control compartment (ERQC), it further trims the carbohydrates to Man(5-6)GlcNAc(2).
GO Classification
Biological Process
protein folding
post-translational protein modification
protein N-linked glycosylation via asparagine
oligosaccharide metabolic process
ER-associated protein catabolic process
Cellular Component
endoplasmic reticulum membrane
endoplasmic reticulum quality control compartment
integral to membrane
Component
membrane
cell part
Function
mannosyl-oligosaccharide 1,2-alpha-mannosidase activity
cation binding
metal ion binding
binding
catalytic activity
hydrolase activity
hydrolase activity, acting on glycosyl bonds
hydrolase activity, hydrolyzing o-glycosyl compounds
calcium ion binding
mannosidase activity
mannosyl-oligosaccharide mannosidase activity
ion binding
Molecular Function
mannosyl-oligosaccharide 1,2-alpha-mannosidase activity
calcium ion binding
Cellular Location
  1. Endoplasmic reticulum membrane
  2. Single-pass type II membrane protein
Pathways
Gene Properties
Chromosome Location 9
Locus 9q34
SNPs MAN1B1
Gene Sequence
>2100 bp
ATGGCTGCCTGCGAGGGCAGGAGAAGCGGAGCTCTCGGTTCCTCTCAGTCGGACTTCCTG
ACGCCGCCAGTGGGCGGGGCCCCTTGGGCCGTCGCCACCACTGTAGTCATGTACCCACCG
CCGCCGCCGCCGCCTCATCGGGACTTCATCTCGGTGACGCTGAGCTTTGGCGAGAACTAT
GACAACAGCAAGAGTTGGCGGCGGCGCTCGTGCTGGAGGAAATGGAAGCAACTGTCGAGA
TTGCAGCGGAATATGATTCTCTTCCTCCTTGCCTTTCTGCTTTTCTGTGGACTCCTCTTC
TACATCAACTTGGCTGACCATTGGAAAGCTCTGGCTTTCAGGCTAGAGGAAGAGCAGAAG
ATGAGGCCAGAAATTGCTGGGTTAAAACCAGCAAATCCACCCGTCTTACCAGCTCCTCAG
AAGGCGGACACCGACCCTGAGAACTTACCTGAGATTTCGTCACAGAAGACACAAAGACAC
ATCCAGCGGGGACCACCTCACCTGCAGATTAGACCCCCAAGCCAAGACCTGAAGGATGGG
ACCCAGGAGGAGGCCACAAAAAGGCAAGAAGCCCCTGTGGATCCCCGCCCGGAAGGAGAT
CCGCAGAGGACAGTCATCAGCTGGAGGGGAGCGGTGATCGAGCCTGAGCAGGGCACCGAG
CTCCCTTCAAGAAGAGCAGAAGTGCCCACCAAGCCTCCCCTGCCACCGGCCAGGACACAG
GGCACACCAGTGCATCTGAACTATCGCCAGAAGGGCGTGATTGACGTCTTCCTGCATGCA
TGGAAAGGATACCGCAAGTTTGCATGGGGCCATGACGAGCTGAAGCCTGTGTCCAGGTCC
TTCAGTGAGTGGTTTGGCCTCGGTCTCACACTGATCGACGCGCTGGACACCATGTGGATC
TTGGGTCTGAGGAAAGAATTTGAGGAAGCCAGGAAGTGGGTGTCGAAGAAGTTACACTTT
GAAAAGGACGTGGACGTCAACCTGTTTGAGAGCACGATCCGCATCCTGGGGGGGCTCCTG
AGTGCCTACCACCTGTCTGGGGACAGCCTCTTCCTGAGGAAAGCTGAGGATTTTGGAAAT
CGGCTAATGCCTGCCTTCAGAACACCATCCAAGATTCCTTACTCGGATGTGAACATCGGT
ACTGGAGTTGCCCACCCGCCACGGTGGACCTCCGACAGCACTGTGGCCGAGGTGACCAGC
ATTCAGCTGGAGTTCCGGGAGCTCTCCCGTCTCACAGGGGATAAGAAGTTTCAGGAGGCA
GTGGAGAAGGTGACACAGCACATCCACGGCCTGTCTGGGAAGAAGGATGGGCTGGTGCCC
ATGTTCATCAATACCCACAGTGGCCTCTTCACCCACCTGGGCGTATTCACGCTGGGCGCC
AGGGCCGACAGCTACTATGAGTACCTGCTGAAGCAGTGGATCCAGGGCGGGAAGCAGGAG
ACACAGCTGCTGGAAGACTACGTGGAAGCCATCGAGGGTGTCAGAACGCACCTGCTGCGG
CACTCCGAGCCCAGTAAGCTCACCTTTGTGGGGGAGCTTGCCCACGGCCGCTTCAGTGCC
AAGATGGACCACCTGGTGTGCTTCCTGCCAGGGACGCTGGCTCTGGGCGTCTACCACGGC
CTGCCCGCCAGCCACATGGAGCTGGCCCAGGAGCTCATGGAGACTTGTTACCAGATGAAC
CGGCAGATGGAGACGGGGCTGAGTCCCGAGATCGTGCACTTCAACCTTTACCCCCAGCCG
GGCCGTCGGGACGTGGAGGTCAAGCCAGCAGACAGGCACAACCTGCTGCGGCCAGAGACC
GTGGAGAGCCTGTTCTACCTGTACCGCGTCACAGGGGACCGCAAATACCAGGACTGGGGC
TGGGAGATTCTGCAGAGCTTCAGCCGATTCACACGGGTCCCCTCGGGTGGCTATTCTTCC
ATCAACAATGTCCAGGATCCTCAGAAGCCCGAGCCTAGGGACAAGATGGAGAGCTTCTTC
CTGGGGGAGACGCTCAAGTATCTGTTCTTGCTCTTCTCCGATGACCCAAACCTGCTCAGC
CTGGATGCCTACGTGTTCAACACCGAAGCCCACCCTCTGCCTATCTGGACCCCTGCCTAG
Protein Properties
Number of Residues 699
Molecular Weight 79579.18
Theoretical pI 7.719
Pfam Domain Function
Signals Not Available
Transmembrane Regions Not Available
Protein Sequence
>Endoplasmic reticulum mannosyl-oligosaccharide 1,2-alpha-mannosidase
MAACEGRRSGALGSSQSDFLTPPVGGAPWAVATTVVMYPPPPPPPHRDFISVTLSFGENY
DNSKSWRRRSCWRKWKQLSRLQRNMILFLLAFLLFCGLLFYINLADHWKALAFRLEEEQK
MRPEIAGLKPANPPVLPAPQKADTDPENLPEISSQKTQRHIQRGPPHLQIRPPSQDLKDG
TQEEATKRQEAPVDPRPEGDPQRTVISWRGAVIEPEQGTELPSRRAEVPTKPPLPPARTQ
GTPVHLNYRQKGVIDVFLHAWKGYRKFAWGHDELKPVSRSFSEWFGLGLTLIDALDTMWI
LGLRKEFEEARKWVSKKLHFEKDVDVNLFESTIRILGGLLSAYHLSGDSLFLRKAEDFGN
RLMPAFRTPSKIPYSDVNIGTGVAHPPRWTSDSTVAEVTSIQLEFRELSRLTGDKKFQEA
VEKVTQHIHGLSGKKDGLVPMFINTHSGLFTHLGVFTLGARADSYYEYLLKQWIQGGKQE
TQLLEDYVEAIEGVRTHLLRHSEPSKLTFVGELAHGRFSAKMDHLVCFLPGTLALGVYHG
LPASHMELAQELMETCYQMNRQMETGLSPEIVHFNLYPQPGRRDVEVKPADRHNLLRPET
VESLFYLYRVTGDRKYQDWGWEILQSFSRFTRVPSGGYSSINNVQDPQKPEPRDKMESFF
LGETLKYLFLLFSDDPNLLSLDAYVFNTEAHPLPIWTPA
GenBank ID Protein 218749883
UniProtKB/Swiss-Prot ID Q9UKM7
UniProtKB/Swiss-Prot Entry Name MA1B1_HUMAN
PDB IDs
GenBank Gene ID NM_016219.3
GeneCard ID MAN1B1
GenAtlas ID MAN1B1
HGNC ID HGNC:6823
References
General References Not Available