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Reviewed, UniProtKB/Swiss-Prot Q9GZQ8 (MLP3B_HUMAN)

Last modified February 9, 2010. Version 93. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (4) | Third-party data | Customize display text xml rdf/xml gff fasta
Names and origin · Protein attributes · General annotation (Comments) · Ontologies · Binary interactions · Sequence annotation (Features) · Sequences · References · Cross-references · Entry information · Relevant documents

Names and origin

Protein namesRecommended name:
    Microtubule-associated proteins 1A/1B light chain 3B
Alternative name(s):
    Microtubule-associated protein 1 light chain 3 beta
    MAP1A/MAP1B light chain 3 B
      Short name=MAP1A/MAP1B LC3 B
    MAP1 light chain 3-like protein 2
    Autophagy-related protein LC3 B
    Autophagy-related ubiquitin-like modifier LC3 B
Gene names
Name: MAP1LC3B
Synonyms: MAP1ALC3
OrganismHomo sapiens (Human) [Complete proteome]
Taxonomic identifier9606 [NCBI]
Taxonomic lineageEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo

Protein attributes

Sequence length125 AA.
Sequence statusComplete.
Sequence processingThe displayed sequence is further processed into a mature form.
Protein existenceEvidence at protein level.

General annotation (Comments)

Function

Probably involved in formation of autophagosomal vacuoles (autophagosomes).

Subunit structure

3 different light chains, LC1, LC2 and LC3, can associate with MAP1A and MAP1B proteins By similarity. Interacts at microtubules with CABP1 (via EF-hands 1 and 2) but not with calmodulin. Ref.9

Subcellular location

Cytoplasm. Endomembrane system; Lipid-anchor. Cytoplasmic vesicleautophagosome membrane; Lipid-anchor. Note: LC3-II binds to the autophagic membranes. Ref.3

Tissue specificity

Most abundant in heart, brain, skeletal muscle and testis. Little expression observed in liver. Ref.3

Post-translational modification

The precursor molecule is cleaved by APG4B/ATG4B to form LC3-I. This is activated by APG7L/ATG7, transferred to ATG3 and conjugated to phospholipid to form LC3-II. Ref.6 Ref.7

Sequence similarities

Belongs to the MAP1 LC3 family.

Caution

Ref.3 has shown that the protein is cleaved at Lys-122 but Ref.7 has shown that the cleavage site is at Gly-120 as in other mammalian orthologs.

Binary interactions

With

Entry

#Exp.

IntAct

Notes

SQSTM1Q135011EBI-373144,EBI-307104
Sqstm1Q643372EBI-373144,EBI-645025From a different organism.
UPF2Q9HAU51EBI-373144,EBI-372073

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Initiator methionine11Removed By similarity
Chain2 – 120119Microtubule-associated proteins 1A/1B light chain 3B
PRO_0000017198
Propeptide121 – 1255Removed in mature form
PRO_0000017199

Amino acid modifications

Lipidation1201Phosphatidylethanolamine amidated glycine Probable

Experimental info

Mutagenesis1201G → A: No processing of precursor. Ref.7
Mutagenesis1221K → A: No effect on processing of precursor. Ref.7
Sequence conflict611S → G in AAH67797. Ref.5

Secondary structure

................... 125
Helix Strand Turn

Details...

Sequences

Sequence LengthMass (Da)Tools
Q9GZQ8-1 [UniParc].

Last modified January 23, 2007. Version 3.
Checksum: BB141DEC7653E83F

FASTA12514,688
        10         20         30         40         50         60 
MPSEKTFKQR RTFEQRVEDV RLIREQHPTK IPVIIERYKG EKQLPVLDKT KFLVPDHVNM 

        70         80         90        100        110        120 
SELIKIIRRR LQLNANQAFF LLVNGHSMVS VSTPISEVYE SEKDEDGFLY MVYASQETFG 


MKLSV 

« Hide

References

« Hide 'large scale' references
[1]"Gene expression profiles in human non-small and small-cell lung cancers."
Difilippantonio S., Chen Y., Pietas A., Schluens K., Pacyna-Gengelbach M., Deutschmann N., Padilla-Nash H.M., Ried T., Petersen I.
Eur. J. Cancer 39:1936-1947(2003) [PubMed: 12932674] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [MRNA].
Tissue: Lung carcinoma.
[2]"The gene expression profiling of sporadic pheochromocytoma and novel full-length cDNAs cloning."
Yang Y.-S., Song H.-D., Peng Y.-D., Huang Q.-H., Li R.-Y., Zhu Z.-D., Hu R.-M., Han Z.-G., Chen J.-L.
Endocr. Relat. Cancer 10:621-627(2003) [PubMed: 14713272] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
Tissue: Pheochromocytoma.
[3]"Post-translational modifications of three members of the human MAP1LC3 family and detection of a novel type of modification for MAP1LC3B."
He H., Dang Y., Dai F., Guo Z., Wu J., She X., Pei Y., Chen Y., Ling W., Wu C., Zhao S., Liu J.O., Yu L.
J. Biol. Chem. 278:29278-29287(2003) [PubMed: 12740394] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [MRNA], SUBCELLULAR LOCATION, TISSUE SPECIFICITY.
[4]"Complete sequencing and characterization of 21,243 full-length human cDNAs."
Ota T., Suzuki Y., Nishikawa T., Otsuki T., Sugiyama T., Irie R., Wakamatsu A., Hayashi K., Sato H., Nagai K., Kimura K., Makita H., Sekine M., Obayashi M., Nishi T., Shibahara T., Tanaka T., Ishii S. expand/collapse author list , Yamamoto J., Saito K., Kawai Y., Isono Y., Nakamura Y., Nagahari K., Murakami K., Yasuda T., Iwayanagi T., Wagatsuma M., Shiratori A., Sudo H., Hosoiri T., Kaku Y., Kodaira H., Kondo H., Sugawara M., Takahashi M., Kanda K., Yokoi T., Furuya T., Kikkawa E., Omura Y., Abe K., Kamihara K., Katsuta N., Sato K., Tanikawa M., Yamazaki M., Ninomiya K., Ishibashi T., Yamashita H., Murakawa K., Fujimori K., Tanai H., Kimata M., Watanabe M., Hiraoka S., Chiba Y., Ishida S., Ono Y., Takiguchi S., Watanabe S., Yosida M., Hotuta T., Kusano J., Kanehori K., Takahashi-Fujii A., Hara H., Tanase T.-O., Nomura Y., Togiya S., Komai F., Hara R., Takeuchi K., Arita M., Imose N., Musashino K., Yuuki H., Oshima A., Sasaki N., Aotsuka S., Yoshikawa Y., Matsunawa H., Ichihara T., Shiohata N., Sano S., Moriya S., Momiyama H., Satoh N., Takami S., Terashima Y., Suzuki O., Nakagawa S., Senoh A., Mizoguchi H., Goto Y., Shimizu F., Wakebe H., Hishigaki H., Watanabe T., Sugiyama A., Takemoto M., Kawakami B., Yamazaki M., Watanabe K., Kumagai A., Itakura S., Fukuzumi Y., Fujimori Y., Komiyama M., Tashiro H., Tanigami A., Fujiwara T., Ono T., Yamada K., Fujii Y., Ozaki K., Hirao M., Ohmori Y., Kawabata A., Hikiji T., Kobatake N., Inagaki H., Ikema Y., Okamoto S., Okitani R., Kawakami T., Noguchi S., Itoh T., Shigeta K., Senba T., Matsumura K., Nakajima Y., Mizuno T., Morinaga M., Sasaki M., Togashi T., Oyama M., Hata H., Watanabe M., Komatsu T., Mizushima-Sugano J., Satoh T., Shirai Y., Takahashi Y., Nakagawa K., Okumura K., Nagase T., Nomura N., Kikuchi H., Masuho Y., Yamashita R., Nakai K., Yada T., Nakamura Y., Ohara O., Isogai T., Sugano S.
Nat. Genet. 36:40-45(2004) [PubMed: 14702039] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
Tissue: Hepatoma.
[5]"The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)."
The MGC Project Team
Genome Res. 14:2121-2127(2004) [PubMed: 15489334] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
Tissue: Brain, Pancreas and Testis.
[6]"HsAtg4B/HsApg4B/autophagin-1 cleaves the carboxyl termini of three human Atg8 homologues and delipidates microtubule-associated protein light chain 3- and GABAA receptor-associated protein-phospholipid conjugates."
Tanida I., Sou Y.-S., Ezaki J., Minematsu-Ikeguchi N., Ueno T., Kominami E.
J. Biol. Chem. 279:36268-36276(2004) [PubMed: 15187094] [Abstract]
Cited for: LIPIDATION, CLEAVAGE BY APG4B.
[7]"Human light chain 3/MAP1LC3B is cleaved at its carboxyl-terminal Met121 to expose Gly120 for lipidation and targeting to autophagosomal membranes."
Tanida I., Ueno T., Kominami E.
J. Biol. Chem. 279:47704-47710(2004) [PubMed: 15355958] [Abstract]
Cited for: CLEAVAGE, MUTAGENESIS OF GLY-120 AND LYS-122.
[8]"LC3 conjugation system in mammalian autophagy."
Tanida I., Ueno T., Kominami E.
Int. J. Biochem. Cell Biol. 36:2503-2518(2004) [PubMed: 15325588] [Abstract]
Cited for: REVIEW.
[9]"Caldendrin but not calmodulin binds to light chain 3 of MAP1A/B: an association with the microtubule cytoskeleton highlighting exclusive binding partners for neuronal Ca(2+)-sensor proteins."
Seidenbecher C.I., Landwehr M., Smalla K.H., Kreutz M., Dieterich D.C., Zuschratter W., Reissner C., Hammarback J.A., Bockers T.M., Gundelfinger E.D., Kreutz M.R.
J. Mol. Biol. 336:957-970(2004) [PubMed: 15095872] [Abstract]
Cited for: INTERACTION WITH CABP1.
[10]"Solution structure of microtubule-associated protein light chain 3 and identification of its functional subdomains."
Kouno T., Mizuguchi M., Tanida I., Ueno T., Kanematsu T., Mori Y., Shinoda H., Hirata M., Kominami E., Kawano K.
J. Biol. Chem. 280:24610-24617(2005) [PubMed: 15857831] [Abstract]
Cited for: STRUCTURE BY NMR OF 1-120.
[11]"Structural basis for sorting mechanism of p62 in selective autophagy."
Ichimura Y., Kumanomidou T., Sou Y.S., Mizushima T., Ezaki J., Ueno T., Kominami E., Yamane T., Tanaka K., Komatsu M.
J. Biol. Chem. 283:22847-22857(2008) [PubMed: 18524774] [Abstract]
Cited for: X-RAY CRYSTALLOGRAPHY (1.56 ANGSTROMS) IN COMPLEX WITH AN LC3 RECOGNITION SEQUENCE (LRS).
+Additional computationally mapped references.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
AF303888 mRNA. Translation: AAG23182.1.
AF183417 mRNA. Translation: AAG09686.1.
AF087871 mRNA. Translation: AAM10499.1.
AK025556 mRNA. Translation: BAB15169.1.
BC018634 mRNA. Translation: AAH18634.1.
BC041874 mRNA. Translation: AAH41874.1.
BC067797 mRNA. Translation: AAH67797.1.
IPIIPI00220482.
RefSeqNP_073729.1.
UniGeneHs.356061

3D structure databases

PDBe
RCSB PDB
PDBj
EntryMethodResolution (Å)ChainPositionsPDBsum
1V49NMR-A1-120[»]
2ZJDX-ray1.56A/C1-125[»]
ModBaseSearch...

Protein-protein interaction databases

DIPDIP-29760N.
IntActQ9GZQ8. 14 interactions.
STRINGQ9GZQ8.

Proteomic databases

PRIDEQ9GZQ8.

Genome annotation databases

EnsemblENST00000268607; ENSP00000268607; ENSG00000140941; Homo sapiens. [Genome view]
GeneID81631.
KEGGhsa:81631.
UCSCuc002fjx.1. human.

Organism-specific databases

CTD81631.
GeneCardsGC16P085982.
H-InvDBHIX0013321.
HIX0035198.
HIX0059104.
HGNCHGNC:13352. MAP1LC3B.
MIM609604. gene.
PharmGKBPA134923100.
GenAtlasSearch...

Phylogenomic databases

HOGENOMHBG592694.
HOVERGENQ9GZQ8.
InParanoidQ9GZQ8.
OMAEEIRSQQ.
OrthoDBEOG9WM7DJ.
PhylomeDBQ9GZQ8.

Gene expression databases

ArrayExpressQ9GZQ8.
BgeeQ9GZQ8.
CleanExHS_MAP1LC3B.
GenevestigatorQ9GZQ8.
GermOnlineENSG00000140941. Homo sapiens.

Family and domain databases

InterProIPR004241. MAP1_LC3.
[Graphical view]
PANTHERPTHR10969. MAP1_LC3. 1 hit.
PfamPF02991. MAP1_LC3. 1 hit.
[Graphical view]
ProtoNetSearch...

Other Resources

NextBio72018.
PMAP-CutDBQ9GZQ8.
SOURCESearch...

Entry information

Entry nameMLP3B_HUMAN
AccessionPrimary (citable) accession number: Q9GZQ8
Secondary accession number(s): Q6NW02
Entry history
Integrated into UniProtKB/Swiss-Prot: December 5, 2001
Last sequence update: January 23, 2007
Last modified: February 9, 2010
This is version 93 of the entry and version 3 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation projectHPI (Human Proteome Initiative)
DisclaimerAny medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care.

Relevant documents

Human chromosome 16

Human chromosome 16: entries, gene names and cross-references to MIM

MIM cross-references

Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot

PDB cross-references

Index of Protein Data Bank (PDB) cross-references

SIMILARITY comments

Index of protein domains and families

Names and origin · Protein attributes · General annotation (Comments) · Ontologies · Binary interactions · Sequence annotation (Features) · Sequences · References · Cross-references · Entry information · Relevant documents