NameLipocalin-1
Synonyms
  • Tear lipocalin
  • Tear prealbumin
  • Tlc
  • TP
  • VEG protein
  • VEGP
  • Von Ebner gland protein
Gene NameLCN1
OrganismHuman
Amino acid sequence
>lcl|BSEQ0013952|Lipocalin-1
MKPLLLAVSLGLIAALQAHHLLASDEEIQDVSGTWYLKAMTVDREFPEMNLESVTPMTLT
TLEGGNLEAKVTMLISGRCQEVKAVLEKTDEPGKYTADGGKHVAYIIRSHVKDHYIFYCE
GELHGKPVRGVKLVGRDPKNNLEALEDFEKAAGARGLSTESILIPRQSETCSPGSD
Number of residues176
Molecular Weight19249.845
Theoretical pINot Available
GO Classification
Functions
  • cysteine-type endopeptidase inhibitor activity
Processes
  • transmembrane transport
  • sensory perception of taste
  • negative regulation of endopeptidase activity
  • retina homeostasis
  • long-chain fatty acid transport
  • proteolysis
  • response to stimulus
Components
  • extracellular space
  • extracellular exosome
  • extracellular region
General FunctionCysteine-type endopeptidase inhibitor activity
Specific FunctionCould play a role in taste reception. Could be necessary for the concentration and delivery of sapid molecules in the gustatory system. Can bind various ligands, with chemical structures ranging from lipids and retinoids to the macrocyclic antibiotic rifampicin and even to microbial siderophores. Exhibits an extremely wide ligand pocket.
Pfam Domain Function
Transmembrane RegionsNot Available
GenBank Protein IDNot Available
UniProtKB IDP31025
UniProtKB Entry NameLCN1_HUMAN
Cellular LocationSecreted
Gene sequence
>lcl|BSEQ0013953|Lipocalin-1 (LCN1)
ATGAAGCCCCTGCTCCTGGCCGTCAGCCTTGGCCTCATTGCTGCCCTGCAGGCCCACCAC
CTCCTGGCCTCAGACGAGGAGATTCAGGATGTGTCAGGGACGTGGTATCTGAAGGCCATG
ACGGTGGACAGGGAGTTCCCTGAGATGAATCTGGAATCGGTGACACCCATGACCCTCACG
ACCCTGGAAGGGGGCAACCTGGAAGCCAAGGTCACCATGCTGATAAGTGGCCGGTGCCAG
GAGGTGAAGGCCGTCCTGGAGAAAACTGACGAGCCGGGAAAATACACGGCCGACGGGGGC
AAGCACGTGGCATACATCATCAGGTCGCACGTGAAGGACCACTACATCTTTTACTGTGAG
GGCGAGCTGCACGGGAAGCCGGTCCGAGGGGTGAAGCTCGTGGGCAGAGACCCCAAGAAC
AACCTGGAAGCCTTGGAGGACTTTGAGAAAGCCGCAGGAGCCCGCGGACTCAGCACGGAG
AGCATCCTCATCCCCAGGCAGAGCGAAACCTGCTCTCCAGGGAGCGATTAG
GenBank Gene IDNot Available
GeneCard IDNot Available
GenAtlas IDNot Available
HGNC IDHGNC:6525
Chromosome Location9
LocusNot Available
References
  1. Blaker M, Kock K, Ahlers C, Buck F, Schmale H: Molecular cloning of human von Ebner's gland protein, a member of the lipocalin superfamily highly expressed in lingual salivary glands. Biochim Biophys Acta. 1993 Feb 20;1172(1-2):131-7. 7679926
  2. Redl B, Holzfeind P, Lottspeich F: cDNA cloning and sequencing reveals human tear prealbumin to be a member of the lipophilic-ligand carrier protein superfamily. J Biol Chem. 1992 Oct 5;267(28):20282-7. 1400345
  3. Lassagne H, Gachon AM: Cloning of a human lacrimal lipocalin secreted in tears. Exp Eye Res. 1993 May;56(5):605-9. 8500570
  4. Holzfeind P, Redl B: Structural organization of the gene encoding the human lipocalin tear prealbumin and synthesis of the recombinant protein in Escherichia coli. Gene. 1994 Feb 25;139(2):177-83. 8112601
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  7. Azkargorta M, Soria J, Ojeda C, Guzman F, Acera A, Iloro I, Suarez T, Elortza F: Human Basal Tear Peptidome Characterization by CID, HCD, and ETD Followed by in Silico and in Vitro Analyses for Antimicrobial Peptide Identification. J Proteome Res. 2015 Jun 5;14(6):2649-58. doi: 10.1021/acs.jproteome.5b00179. Epub 2015 May 20. 25946035
  8. Wojnar P, Lechner M, Merschak P, Redl B: Molecular cloning of a novel lipocalin-1 interacting human cell membrane receptor using phage display. J Biol Chem. 2001 Jun 8;276(23):20206-12. Epub 2001 Apr 3. 11287427
  9. Wojnar P, Lechner M, Redl B: Antisense down-regulation of lipocalin-interacting membrane receptor expression inhibits cellular internalization of lipocalin-1 in human NT2 cells. J Biol Chem. 2003 May 2;278(18):16209-15. Epub 2003 Feb 18. 12591932
  10. Breustedt DA, Korndorfer IP, Redl B, Skerra A: The 1.8-A crystal structure of human tear lipocalin reveals an extended branched cavity with capacity for multiple ligands. J Biol Chem. 2005 Jan 7;280(1):484-93. Epub 2004 Oct 15. 15489503