ExPASy logo ExPASy Home page Site Map Search ExPASy Contact us Swiss-Prot
Notice: This page will be replaced with www.uniprot.org. Please send us your feedback!
Search for

UniProtKB/Swiss-Prot entry O00754


[Entry info] [Name and origin] [References] [Comments] [Cross-references] [Keywords] [Features] [Sequence] [Tools]

Note: most headings are clickable, even if they don't appear as links. They link to the user manual or other documents.
Entry information
Entry name MA2B1_HUMAN
Primary accession number O00754
Secondary accession numbers O15330 Q16680 Q93094 Q9BW13
Integrated into Swiss-Prot on July 15, 1998
Sequence was last modified on October 31, 2006 (Sequence version 3)
Annotations were last modified on    July 22, 2008 (Entry version 84)
Name and origin of the protein
Protein name Lysosomal alpha-mannosidase [Precursor]
Synonyms Laman
EC 3.2.1.24
Lysosomal acid alpha-mannosidase
Mannosidase alpha class 2B member 1
Mannosidase, alpha B
Contains Lysosomal alpha-mannosidase A peptide
Lysosomal alpha-mannosidase B peptide
Lysosomal alpha-mannosidase C peptide
Lysosomal alpha-mannosidase D peptide
Lysosomal alpha-mannosidase E peptide
Gene name
Name: MAN2B1
Synonyms: LAMAN, MANB
From
Homo sapiens (Human) [TaxID: 9606] 
Taxonomy Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo.
Protein existence 1: Evidence at protein level;
References
[1]
NUCLEOTIDE SEQUENCE [MRNA].
DOI=10.1006/bbrc.1994.1440; PubMed=8166692 [NCBI, ExPASy, EBI, Israel, Japan]
Nebes V.L., Schmidt M.C.;
"Human lysosomal alpha-mannosidase: isolation and nucleotide sequence of the full-length cDNA.";
Biochem. Biophys. Res. Commun. 200:239-245(1994).
[2]
NUCLEOTIDE SEQUENCE [MRNA], PARTIAL PROTEIN SEQUENCE, AND VARIANT AM LEU-72.
TISSUE=Lung, and Skin;
DOI=10.1093/hmg/6.5.717; PubMed=9158146 [NCBI, ExPASy, EBI, Israel, Japan]
Nilssen O., Berg T., Riise H.M.F., Ramachandran U., Evjen G., Hansen G.M., Malm D., Tranebjaerg L., Tollersrud O.-K.;
"Alpha-mannosidosis: functional cloning of the lysosomal alpha-mannosidase cDNA and identification of a mutation in two affected siblings.";
Hum. Mol. Genet. 6:717-726(1997).
[3]
NUCLEOTIDE SEQUENCE [GENOMIC DNA].
DOI=10.1006/geno.1997.4668; PubMed=9192839 [NCBI, ExPASy, EBI, Israel, Japan]
Riise H.M.F., Berg T., Nilssen O., Romeo G., Tollersrud O.-K., Ceccherini I.;
"Genomic structure of the human lysosomal alpha-mannosidase gene (MANB).";
Genomics 42:200-207(1997).
[4]
NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
TISSUE=Placenta;
DOI=10.1101/gr.2596504; PubMed=15489334 [NCBI, ExPASy, EBI, Israel, Japan]
The MGC Project Team;
"The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).";
Genome Res. 14:2121-2127(2004).
[5]
NUCLEOTIDE SEQUENCE [MRNA] OF 9-1010.
TISSUE=Spleen;
DOI=10.1074/jbc.271.45.28348; PubMed=8910458 [NCBI, ExPASy, EBI, Israel, Japan]
Liao Y.-F., Lal A., Moremen K.W.;
"Cloning, expression, purification, and characterization of the human broad specificity lysosomal acid alpha-mannosidase.";
J. Biol. Chem. 271:28348-28358(1996).
[6]
PARTIAL PROTEIN SEQUENCE.
PubMed=7832746 [NCBI, ExPASy, EBI, Israel, Japan]
Emiliani C., Martino S., Stirling J.L., Maras B., Orlacchio A.;
"Partial sequence of the purified protein confirms the identity of cDNA coding for human lysosomal alpha-mannosidase B.";
Biochem. J. 305:363-366(1995).
[7]
GLYCOSYLATION AT ASN-930.
DOI=10.1038/nbt827; PubMed=12754519 [NCBI, ExPASy, EBI, Israel, Japan]
Zhang H., Li X.-J., Martin D.B., Aebersold R.;
"Identification and quantification of N-linked glycoproteins using hydrazide chemistry, stable isotope labeling and mass spectrometry.";
Nat. Biotechnol. 21:660-666(2003).
[8]
VARIANTS AM LEU-72; ARG-356 AND TRP-750.
DOI=10.1086/302048; PubMed=9758606 [NCBI, ExPASy, EBI, Israel, Japan]
Gotoda Y., Wakamatsu N., Kawai H., Nishida Y., Matsumoto T.;
"Missense and nonsense mutations in the lysosomal alpha-mannosidase gene (MANB) in severe and mild forms of alpha-mannosidosis.";
Am. J. Hum. Genet. 63:1015-1024(1998).
[9]
VARIANTS AM PRO-355; LYS-402; ARG-714 AND PRO-809, AND VARIANTS VAL-278; ILE-312; GLN-337 AND SER-413.
DOI=10.1086/302183; PubMed=9915946 [NCBI, ExPASy, EBI, Israel, Japan]
Berg T., Riise H.M.F., Hansen G.M., Malm D., Tranebjaerg L., Tollersrud O.-K., Nilssen O.;
"Spectrum of mutations in alpha-mannosidosis.";
Am. J. Hum. Genet. 64:77-88(1999).
[10]
VARIANT AM TYR-453.
PubMed=12718372 [NCBI, ExPASy, EBI, Israel, Japan]
Oelmez A., Nilssen O., Coskun T., Klenow H.;
"Alpha-mannosidosis and mutational analysis in a Turkish patient.";
Turk. J. Pediatr. 45:46-50(2003).
[11]
VARIANTS AM LEU-200 AND ASP-801, AND CHARACTERIZATION OF VARIANTS AM LEU-200 AND ASP-801.
DOI=10.1002/humu.9310; PubMed=15712269 [NCBI, ExPASy, EBI, Israel, Japan]
Sbaragli M., Bibi L., Pittis M.G., Balducci C., Heikinheimo P., Ricci R., Antuzzi D., Parini R., Spaccini L., Bembi B., Beccari T.;
"Identification and characterization of five novel MAN2B1 mutations in Italian patients with alpha-mannosidosis.";
Hum. Mutat. 25:320-320(2005).
Comments
  • FUNCTION: Necessary for the catabolism of N-linked carbohydrates released during glycoprotein turnover. Cleaves all known types of alpha-mannosidic linkages.
  • CATALYTIC ACTIVITY: Hydrolysis of terminal, non-reducing alpha-D-mannose residues in alpha-D-mannosides.
  • COFACTOR: Binds 1 zinc ion per subunit (By similarity).
  • SUBCELLULAR LOCATION: Lysosome.
  • PTM: First processed into 3 peptides of 70 kDa, 42 kDa (D) and 13/15 kDa (E). The 70 kDa peptide is further processed into three peptides (A, B and C). The A, B and C peptides are disulfide-linked.
  • PTM: Heavily glycosylated.
  • DISEASE: Defects in MAN2B1 are the cause of lysosomal alpha-mannosidosis (AM) [MIM:248500]. AM is a lysosomal storage disease characterized by accumulation of unbranched oligosaccharide chains. This accumulation is expressed histologically as cytoplasmic vacuolation predominantly in the CNS and parenchymatous organs. Depending on the clinical findings at the age of onset, a severe infantile (type I) and a mild juvenile (type II) form of alpha-mannosidosis are recognized. There is considerable variation in the clinical expression with mental retardation, recurrent infections, impaired hearing and Hurler-like skeletal changes being the most consistent abnormalities.
  • SIMILARITY: Belongs to the glycosyl hydrolase 38 family [view classification].
  • WEB RESOURCE: Name=GeneReviews; URL="http://www.genetests.org/query?gene=MAN2B1";.
Copyright
Copyrighted by the UniProt Consortium, see http://www.uniprot.org/terms. Distributed under the Creative Commons Attribution-NoDerivs License.
Cross-references
Sequence databases
EMBL
U05572; AAB03816.1; ALT_INIT; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
U60266; AAC34130.1; -; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
U60899; AAC51362.1; -; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
U60885; AAC51362.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
U60886; AAC51362.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
U60887; AAC51362.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
U60888; AAC51362.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
U60889; AAC51362.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
U60890; AAC51362.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
U60891; AAC51362.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
U60892; AAC51362.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
U60893; AAC51362.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
U60894; AAC51362.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
U60895; AAC51362.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
U60896; AAC51362.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
U60897; AAC51362.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
U60898; AAC51362.1; JOINED; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
BC000736; AAH00736.1; -; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
U68567; AAC50812.1; ALT_INIT; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
RefSeq NP_000519.2; -.
UniGene Hs.356769
3D structure databases
HSSP Q29451; 1O7D. [HSSP ENTRY / PDB]
SMR O00754; 51-341, 605-874, 885-1006.
ModBase O00754.
Organism-specific databases
HGNC HGNC:6826; MAN2B1.
GenAtlas MAN2B1.
MIM 248500; phenotype. [NCBI / EBI]
609458; gene. [NCBI / EBI]
Orphanet 61; Alpha-mannosidosis.
PharmGKB PA30575; -.
GeneCards O00754.
Gene expression databases
ArrayExpress O00754; -.
CleanEx HS_MAN2B1; -.
GermOnline ENSG00000104774; Homo sapiens.
Ontologies
GO
GO:0004559; Molecular function: alpha-mannosidase activity (traceable author statement from ProtInc).
GO:0006517; Biological process: protein deglycosylation (traceable author statement from ProtInc).
QuickGo view.
Family and domain databases
InterPro IPR013780; Glyco_hydro_13_b.
IPR011682; Glyco_hydro_38_C.
IPR015341; Glyco_hydro_38_central.
IPR000602; Glyco_hydro_38_core.
Graphical view of domain structure.
Gene3D G3DSA:2.60.40.1180; Glyco_hydro_13_b; 1.
G3DSA:3.20.110.10; Glyco_hydro_38_core; 1.
Pfam PF09261; Alpha-mann_mid; 1.
PF01074; Glyco_hydro_38; 1.
PF07748; Glyco_hydro_38C; 1.
Pfam graphical view of domain structure.
BLOCKS O00754.
Genome annotation databases
Ensembl ENSG00000104774; Homo sapiens. [Contig view]
GeneID 4125; -.
KEGG hsa:4125; -.
Phylogenomic databases
HOGENOM O00754; -.
HOVERGEN O00754; -.
Other
SOURCE MAN2B1; Homo sapiens.
ProtoNet O00754.
UniRef View cluster of proteins with at least 50% / 90% / 100% identity.
Keywords
Direct protein sequencing; Disease mutation; Glycoprotein; Glycosidase; Hydrolase; Lysosome; Metal-binding; Polymorphism; Signal; Zinc; Zymogen.
Features
SEVIEWER logo Feature table viewer FT aligner logo Feature aligner
KeyFrom   To Length Description FTId
SIGNAL   1     49  49      
CHAIN   50   1011  962     Lysosomal alpha-mannosidase. PRO_0000012069
CHAIN   50    345  296     Lysosomal alpha-mannosidase A peptide. PRO_0000012070
CHAIN   346    429  84     Lysosomal alpha-mannosidase B peptide. PRO_0000012071
CHAIN   430    601  172     Lysosomal alpha-mannosidase C peptide. PRO_0000012072
CHAIN   602    882  281     Lysosomal alpha-mannosidase D peptide. PRO_0000012073
CHAIN   883   1011  129     Lysosomal alpha-mannosidase E peptide. PRO_0000012074
ACT_SITE   196    196        Nucleophile (By similarity). 
METAL   72     72        Zinc (By similarity). 
METAL   74     74        Zinc (By similarity). 
METAL   196    196        Zinc (By similarity). 
METAL   446    446        Zinc (By similarity). 
CARBOHYD   133    133        N-linked (GlcNAc...) (Potential). 
CARBOHYD   310    310        N-linked (GlcNAc...) (Potential). 
CARBOHYD   367    367        N-linked (GlcNAc...) (Potential). 
CARBOHYD   497    497        N-linked (GlcNAc...) (Potential). 
CARBOHYD   645    645        N-linked (GlcNAc...) (Potential). 
CARBOHYD   651    651        N-linked (GlcNAc...) (Potential). 
CARBOHYD   692    692        N-linked (GlcNAc...) (Potential). 
CARBOHYD   766    766        N-linked (GlcNAc...) (Potential). 
CARBOHYD   832    832        N-linked (GlcNAc...) (Potential). 
CARBOHYD   930    930        N-linked (GlcNAc...). 
CARBOHYD   989    989        N-linked (GlcNAc...) (Potential). 
DISULFID   55    358        By similarity. 
DISULFID   268    273        By similarity. 
DISULFID   412    472        By similarity. 
DISULFID   493    501        By similarity. 
VARIANT   72     72  1     H -> L (in AM; type II). VAR_003338 
VARIANT   200    200  1     H -> L (in AM; no residual enzyme activity). VAR_026412 
VARIANT   278    278  1     L -> V. VAR_003339 
VARIANT   312    312  1     T -> I. VAR_003340 
VARIANT   337    337  1     R -> Q. VAR_003341 
VARIANT   355    355  1     T -> P (in AM). VAR_003342 
VARIANT   356    356  1     P -> R (in AM; type I). VAR_003343 
VARIANT   402    402  1     E -> K (in AM). VAR_003344 
VARIANT   413    413  1     N -> S. VAR_003345 
VARIANT   453    453  1     S -> Y (in AM). VAR_026413 
VARIANT   714    714  1     W -> R (in AM). VAR_003346 
VARIANT   750    750  1     R -> W (in AM; type II). VAR_003347 
VARIANT   801    801  1     G -> D (in AM; no residual enzyme activity). VAR_026414 
VARIANT   809    809  1     L -> P (in AM). VAR_003348 
CONFLICT   3      3        Missing (in Ref. 3; AAC51362). 
CONFLICT   186    186        D -> V (in Ref. 2; AAC34130). 
CONFLICT   343    343        Missing (in Ref. 1; AAB03816). 
CONFLICT   384    384        P -> H (in Ref. 5; AAC50812). 
Sequence information
Length: 1011 AA [This is the length of the unprocessed precursor] Molecular weight: 113744 Da [This is the MW of the unprocessed precursor] CRC64: E11C77C19D8BD88C [This is a checksum on the sequence]
        10         20         30         40         50         60 
MGAYARASGV CARGCLDSAG PWTMSRALRP PLPPLCFFLL LLAAAGARAG GYETCPTVQP 

        70         80         90        100        110        120 
NMLNVHLLPH THDDVGWLKT VDQYFYGIKN DIQHAGVQYI LDSVISALLA DPTRRFIYVE 

       130        140        150        160        170        180 
IAFFSRWWHQ QTNATQEVVR DLVRQGRLEF ANGGWVMNDE AATHYGAIVD QMTLGLRFLE 

       190        200        210        220        230        240 
DTFGNDGRPR VAWHIDPFGH SREQASLFAQ MGFDGFFFGR LDYQDKWVRM QKLEMEQVWR 

       250        260        270        280        290        300 
ASTSLKPPTA DLFTGVLPNG YNPPRNLCWD VLCVDQPLVE DPRSPEYNAK ELVDYFLNVA 

       310        320        330        340        350        360 
TAQGRYYRTN HTVMTMGSDF QYENANMWFK NLDKLIRLVN AQQAKGSSVH VLYSTPACYL 

       370        380        390        400        410        420 
WELNKANLTW SVKHDDFFPY ADGPHQFWTG YFSSRPALKR YERLSYNFLQ VCNQLEALVG 

       430        440        450        460        470        480 
LAANVGPYGS GDSAPLNEAM AVLQHHDAVS GTSRQHVAND YARQLAAGWG PCEVLLSNAL 

       490        500        510        520        530        540 
ARLRGFKDHF TFCQQLNISI CPLSQTAARF QVIVYNPLGR KVNWMVRLPV SEGVFVVKDP 

       550        560        570        580        590        600 
NGRTVPSDVV IFPSSDSQAH PPELLFSASL PALGFSTYSV AQVPRWKPQA RAPQPIPRRS 

       610        620        630        640        650        660 
WSPALTIENE HIRATFDPDT GLLMEIMNMN QQLLLPVRQT FFWYNASIGD NESDQASGAY 

       670        680        690        700        710        720 
IFRPNQQKPL PVSRWAQIHL VKTPLVQEVH QNFSAWCSQV VRLYPGQRHL ELEWSVGPIP 

       730        740        750        760        770        780 
VGDTWGKEVI SRFDTPLETK GRFYTDSNGR EILERRRDYR PTWKLNQTEP VAGNYYPVNT 

       790        800        810        820        830        840 
RIYITDGNMQ LTVLTDRSQG GSSLRDGSLE LMVHRRLLKD DGRGVSEPLM ENGSGAWVRG 

       850        860        870        880        890        900 
RHLVLLDTAQ AAAAGHRLLA EQEVLAPQVV LAPGGGAAYN LGAPPRTQFS GLRRDLPPSV 

       910        920        930        940        950        960 
HLLTLASWGP EMVLLRLEHQ FAVGEDSGRN LSAPVTLNLR DLFSTFTITR LQETTLVANQ 

       970        980        990       1000       1010 
LREAASRLKW TTNTGPTPHQ TPYQLDPANI TLEPMEIRTF LASVQWKEVD G 

O00754 in FASTA format

View entry in original UniProtKB/Swiss-Prot format
View entry in raw text format (no links)
Report form for errors/updates in this UniProtKB/Swiss-Prot entry

BLAST logo BLAST submission on ExPASy/SIB
or at NCBI (USA)
Tools Sequence analysis tools: ProtParam, ProtScale, Compute pI/Mw, PeptideMass, PeptideCutter, Dotlet (Java)
PROSITE logo ScanProsite, MotifScan SWISS-MODEL Submit a homology modeling request to SWISS-MODEL
NPSA logo NPSA Sequence analysis tools

ExPASy logo ExPASy Home page Site Map Search ExPASy Contact us Swiss-Prot
 Hosted by ch flag SIB Switzerland Mirror sites: Australia  Brazil  Canada  China  Korea
Notice: This page will be replaced with www.uniprot.org. Please send us your feedback!