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Entry version 130 (16 Oct 2019)
Sequence version 1 (01 Jan 1998)
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Protein

Keratocan

Gene

KERA

Organism
Gallus gallus (Chicken)
Status
Reviewed-Annotation score:

Annotation score:3 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
-Experimental evidence at protein leveli <p>This indicates the type of evidence that supports the existence of the protein. Note that the ‘protein existence’ evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Plays an important role in generating and maintaining a transparent matrix within the corneal stroma.

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Biological processi

Enzyme and pathway databases

Reactome - a knowledgebase of biological pathways and processes

More...
Reactomei
R-GGA-2022854 Keratan sulfate biosynthesis
R-GGA-2022857 Keratan sulfate degradation

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Keratocan
Short name:
KTN
Alternative name(s):
Keratan sulfate proteoglycan keratocan
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: ‘Name’, ‘Synonyms’, ‘Ordered locus names’ and ‘ORF names’.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:KERA
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiGallus gallus (Chicken)
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the ‘taxonomic identifier’ or ‘taxid’.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri9031 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiArchelosauriaArchosauriaDinosauriaSaurischiaTheropodaCoelurosauriaAvesNeognathaeGalloanseraeGalliformesPhasianidaePhasianinaeGallus
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
  • UP000000539 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes_manual">proteome</a> can consist of several components. <br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Chromosome 1

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionGraphics by Christian Stolte & Seán O’Donoghue; Source: COMPARTMENTS

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywords - Cellular componenti

Extracellular matrix, Secreted

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘PTM / Processing’ section denotes the presence of an N-terminal signal peptide.<p><a href='/help/signal' target='_top'>More...</a></p>Signal peptidei1 – 21Sequence analysisAdd BLAST21
<p>This subsection of the ‘PTM / Processing’ section describes the extent of a polypeptide chain in the mature protein following processing.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_000003275022 – 353KeratocanAdd BLAST332

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the PTM / Processing":/help/ptm_processing_section section describes the positions of cysteine residues participating in disulfide bonds.<p><a href='/help/disulfid' target='_top'>More...</a></p>Disulfide bondi43 ↔ 49By similarity
Disulfide bondi47 ↔ 59By similarity
<p>This subsection of the <a href="http://www.uniprot.org/help/ptm_processing_section">PTM / Processing</a> section specifies the position and type of each covalently attached glycan group (mono-, di-, or polysaccharide).<p><a href='/help/carbohyd' target='_top'>More...</a></p>Glycosylationi94N-linked (GlcNAc...) (keratan sulfate) asparagine1 Publication1
Glycosylationi168N-linked (GlcNAc...) asparagineSequence analysis1
Glycosylationi223N-linked (GlcNAc...) (keratan sulfate) asparagine1 Publication1
Glycosylationi261N-linked (GlcNAc...) (keratan sulfate) asparagine1 Publication1
Glycosylationi299N-linked (GlcNAc...) asparagineSequence analysis1
Disulfide bondi304 ↔ 344By similarity

<p>This subsection of the <a href="http://www.uniprot.org/help/ptm_processing_section">PTM/processing</a> section describes post-translational modifications (PTMs). This subsection <strong>complements</strong> the information provided at the sequence level or describes modifications for which <strong>position-specific data is not yet available</strong>.<p><a href='/help/post-translational_modification' target='_top'>More...</a></p>Post-translational modificationi

Binds keratan sulfate chains.

Keywords - PTMi

Disulfide bond, Glycoprotein, Proteoglycan

Proteomic databases

PaxDb, a database of protein abundance averages across all three domains of life

More...
PaxDbi
O42235

PTM databases

iPTMnet integrated resource for PTMs in systems biology context

More...
iPTMneti
O42235

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

Gene expression databases

Bgee dataBase for Gene Expression Evolution

More...
Bgeei
ENSGALG00000011270 Expressed in 1 organ(s), highest expression level in cerebellum

ExpressionAtlas, Differential and Baseline Expression

More...
ExpressionAtlasi
O42235 baseline and differential

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
9031.ENSGALP00000018369

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

3D structure databases

SWISS-MODEL Repository - a database of annotated 3D protein structure models

More...
SMRi
O42235

Database of comparative protein structure models

More...
ModBasei
Search...

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/family_and_domains_section">Family and Domains</a> section describes the position and type of a domain, which is defined as a specific combination of secondary structures organized into a characteristic three-dimensional structure or fold.<p><a href='/help/domain' target='_top'>More...</a></p>Domaini34 – 72LRRNTAdd BLAST39
<p>This subsection of the ‘Family and Domains’ section indicates the positions and types of repeated sequence motifs or repeated domains within the protein.<p><a href='/help/repeat' target='_top'>More...</a></p>Repeati73 – 94LRR 1Add BLAST22
Repeati97 – 118LRR 2Add BLAST22
Repeati123 – 143LRR 3Add BLAST21
Repeati144 – 165LRR 4Add BLAST22
Repeati168 – 188LRR 5Add BLAST21
Repeati194 – 214LRR 6Add BLAST21
Repeati215 – 236LRR 7Add BLAST22
Repeati239 – 262LRR 8Add BLAST24
Repeati264 – 283LRR 9Add BLAST20
Repeati284 – 305LRR 10Add BLAST22

<p>This subsection of the ‘Family and domains’ section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Keywords - Domaini

Leucine-rich repeat, Repeat, Signal

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
KOG0619 Eukaryota
COG4886 LUCA

Ensembl GeneTree

More...
GeneTreei
ENSGT00940000158968

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
HOG000234447

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
O42235

KEGG Orthology (KO)

More...
KOi
K08123

Identification of Orthologs from Complete Genome Data

More...
OMAi
IKPPIPM

Database of Orthologous Groups

More...
OrthoDBi
826997at2759

Database for complete collections of gene phylogenies

More...
PhylomeDBi
O42235

TreeFam database of animal gene trees

More...
TreeFami
TF334562

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
3.80.10.10, 3 hits

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR001611 Leu-rich_rpt
IPR003591 Leu-rich_rpt_typical-subtyp
IPR032675 LRR_dom_sf
IPR000372 LRRNT

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF13516 LRR_6, 1 hit
PF13855 LRR_8, 2 hits
PF01462 LRRNT, 1 hit

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00369 LRR_TYP, 5 hits
SM00013 LRRNT, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS51450 LRR, 10 hits

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence_length">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequencei

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is in its mature form or if it represents the precursor.<p><a href='/help/sequence_processing' target='_top'>More...</a></p>Sequence processingi: The displayed sequence is further processed into a mature form.

O42235-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MMTLKVCPSL LLLFLVHSVW TRTVRQVYNE LDPEHWSHYT FECPQECFCP
60 70 80 90 100
PSFPNALYCD NKGLKEIPAI PARIWYLYLQ NNLIETISEK PFVNATHLRW
110 120 130 140 150
INLNKNKITN NGIESGVLSK LKRLLYLFLE DNELEEVPAP LPVGLEQLRL
160 170 180 190 200
ARNKISRIPE GVFSNLENLT MLDLHQNNLL DSALQSDTFQ GLNSLMQLNI
210 220 230 240 250
AKNSLKKMPL SIPANTLQLF LDNNSIEVIP ENYFSAIPKV TFLRLNYNKL
260 270 280 290 300
SDDGIPPNGF NVSSILDLQL SHNQLTKIPP INAHLEHLHL DHNRIKSVNG
310 320 330 340 350
TQICPVSIAV AEDYGLYGNI PRLRYLRLDG NEIQPPIPLD IMICFQLLQA

VVI
Length:353
Mass (Da):40,266
Last modified:January 1, 1998 - v1
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:iCBF42601FDF33ED6
GO

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

More...
GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
AF022890 mRNA Translation: AAC15506.1

NCBI Reference Sequences

More...
RefSeqi
NP_989507.1, NM_204176.1
XP_015139177.1, XM_015283691.1
XP_015139185.1, XM_015283699.1
XP_015139192.1, XM_015283706.1

Genome annotation databases

Ensembl eukaryotic genome annotation project

More...
Ensembli
ENSGALT00000018391; ENSGALP00000018369; ENSGALG00000011270
ENSGALT00000061247; ENSGALP00000043919; ENSGALG00000011270
ENSGALT00000085113; ENSGALP00000064476; ENSGALG00000011270

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
373995

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
gga:373995

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF022890 mRNA Translation: AAC15506.1
RefSeqiNP_989507.1, NM_204176.1
XP_015139177.1, XM_015283691.1
XP_015139185.1, XM_015283699.1
XP_015139192.1, XM_015283706.1

3D structure databases

SMRiO42235
ModBaseiSearch...

Protein-protein interaction databases

STRINGi9031.ENSGALP00000018369

PTM databases

iPTMnetiO42235

Proteomic databases

PaxDbiO42235

Genome annotation databases

EnsembliENSGALT00000018391; ENSGALP00000018369; ENSGALG00000011270
ENSGALT00000061247; ENSGALP00000043919; ENSGALG00000011270
ENSGALT00000085113; ENSGALP00000064476; ENSGALG00000011270
GeneIDi373995
KEGGigga:373995

Organism-specific databases

Comparative Toxicogenomics Database

More...
CTDi
11081

Phylogenomic databases

eggNOGiKOG0619 Eukaryota
COG4886 LUCA
GeneTreeiENSGT00940000158968
HOGENOMiHOG000234447
InParanoidiO42235
KOiK08123
OMAiIKPPIPM
OrthoDBi826997at2759
PhylomeDBiO42235
TreeFamiTF334562

Enzyme and pathway databases

ReactomeiR-GGA-2022854 Keratan sulfate biosynthesis
R-GGA-2022857 Keratan sulfate degradation

Miscellaneous databases

Protein Ontology

More...
PROi
PR:O42235

Gene expression databases

BgeeiENSGALG00000011270 Expressed in 1 organ(s), highest expression level in cerebellum
ExpressionAtlasiO42235 baseline and differential

Family and domain databases

Gene3Di3.80.10.10, 3 hits
InterProiView protein in InterPro
IPR001611 Leu-rich_rpt
IPR003591 Leu-rich_rpt_typical-subtyp
IPR032675 LRR_dom_sf
IPR000372 LRRNT
PfamiView protein in Pfam
PF13516 LRR_6, 1 hit
PF13855 LRR_8, 2 hits
PF01462 LRRNT, 1 hit
SMARTiView protein in SMART
SM00369 LRR_TYP, 5 hits
SM00013 LRRNT, 1 hit
PROSITEiView protein in PROSITE
PS51450 LRR, 10 hits

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the ‘Entry information’ section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiKERA_CHICK
<p>This subsection of the ‘Entry information’ section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called ‘Primary (citable) accession number’.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: O42235
<p>This subsection of the ‘Entry information’ section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification (‘Last modified’). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: February 11, 2002
Last sequence update: January 1, 1998
Last modified: October 16, 2019
This is version 130 of the entry and version 1 of the sequence. See complete history.
<p>This subsection of the ‘Entry information’ section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

<p>This section contains any relevant information that doesn’t fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Keywords - Technical termi

Complete proteome, Direct protein sequencing, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families
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