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Entry version 94 (13 Feb 2019)
Sequence version 1 (24 Jul 2007)
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Protein

Keratin, type I cytoskeletal 28

Gene

Krt28

Organism
Mus musculus (Mouse)
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

Essential for the proper assembly of types I and II keratin protein complexes and the formation of keratin intermediate filaments in the inner root sheath (irs).2 Publications

Miscellaneous

There are two types of cytoskeletal and microfibrillar keratin: I (acidic; 40-55 kDa) and II (neutral to basic; 56-70 kDa).Curated

<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 - Molecular functioni

Enzyme and pathway databases

Reactome - a knowledgebase of biological pathways and processes

More...
Reactomei
R-MMU-6805567 Keratinization
R-MMU-6809371 Formation of the cornified envelope

<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:
Keratin, type I cytoskeletal 28
Alternative name(s):
Cytokeratin-28
Short name:
CK-28
Keratin-25D
Short name:
K25D
Keratin-28
Short name:
K28
Type I inner root sheath-specific keratin-K25irs4
<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:Krt28Imported
Synonyms:Krt25dImported
<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>OrganismiMus musculus (Mouse)
<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 identifieri10090 [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 lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaMyomorphaMuroideaMuridaeMurinaeMusMus
<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
  • UP000000589 <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 11

Organism-specific databases

Mouse genome database (MGD) from Mouse Genome Informatics (MGI)

More...
MGIi
MGI:1918093 Krt28

<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; 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

Cytoplasm, Intermediate filament, Keratin

<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 describes the extent of a polypeptide chain in the mature protein following processing.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00003127061 – 462Keratin, type I cytoskeletal 28Add BLAST462

Proteomic databases

Encyclopedia of Proteome Dynamics

More...
EPDi
A6BLY7

jPOST - Japan Proteome Standard Repository/Database

More...
jPOSTi
A6BLY7

MaxQB - The MaxQuant DataBase

More...
MaxQBi
A6BLY7

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

More...
PaxDbi
A6BLY7

PeptideAtlas

More...
PeptideAtlasi
A6BLY7

PRoteomics IDEntifications database

More...
PRIDEi
A6BLY7

PTM databases

iPTMnet integrated resource for PTMs in systems biology context

More...
iPTMneti
A6BLY7

Comprehensive resource for the study of protein post-translational modifications (PTMs) in human, mouse and rat.

More...
PhosphoSitePlusi
A6BLY7

<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

<p>This subsection of the ‘Expression’ section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms. By default, the information is derived from experiments at the mRNA level, unless specified ‘at protein level’. <br></br>Examples: <a href="http://www.uniprot.org/uniprot/P92958#expression">P92958</a>, <a href="http://www.uniprot.org/uniprot/Q8TDN4#expression">Q8TDN4</a>, <a href="http://www.uniprot.org/uniprot/O14734#expression">O14734</a><p><a href='/help/tissue_specificity' target='_top'>More...</a></p>Tissue specificityi

In the hair follicle and bulb, uniformly expressed in all three layers of the inner root sheath (the Henle layer, the Huxley layer and the cuticle) and observed in matrix cells (at protein level).1 Publication

Gene expression databases

Bgee dataBase for Gene Expression Evolution

More...
Bgeei
ENSMUSG00000055937 Expressed in 33 organ(s), highest expression level in skin of back

Genevisible search portal to normalized and curated expression data from Genevestigator

More...
Genevisiblei
A6BLY7 MM

<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

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction_section">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Heterotetramer of two type I and two type II keratins.Curated

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
10090.ENSMUSP00000006963

<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

Protein Model Portal of the PSI-Nature Structural Biology Knowledgebase

More...
ProteinModelPortali
A6BLY7

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

More...
SMRi
A6BLY7

Database of comparative protein structure models

More...
ModBasei
Search...

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
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>Domaini84 – 399IF rodPROSITE-ProRule annotationAdd BLAST316

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Family and Domains’ section describes a region of interest that cannot be described in other subsections.<p><a href='/help/region' target='_top'>More...</a></p>Regioni1 – 83HeadSequence analysisAdd BLAST83
Regioni84 – 119Coil 1ASequence analysisAdd BLAST36
Regioni120 – 141Linker 1Sequence analysisAdd BLAST22
Regioni142 – 233Coil 1BSequence analysisAdd BLAST92
Regioni234 – 256Linker 12Sequence analysisAdd BLAST23
Regioni257 – 395Coil 2Sequence analysisAdd BLAST139
Regioni396 – 462TailSequence analysisAdd BLAST67

Compositional bias

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Family and Domains’ section describes the position of regions of compositional bias within the protein and the particular amino acids that are over-represented within those regions.<p><a href='/help/compbias' target='_top'>More...</a></p>Compositional biasi7 – 82Gly-richSequence analysisAdd BLAST76

<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

Belongs to the intermediate filament family.PROSITE-ProRule annotation

Keywords - Domaini

Coiled coil

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
ENOG410IFTF Eukaryota
ENOG410Y9IV LUCA

Ensembl GeneTree

More...
GeneTreei
ENSGT00940000162192

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
HOG000230975

The HOVERGEN Database of Homologous Vertebrate Genes

More...
HOVERGENi
HBG013015

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
A6BLY7

KEGG Orthology (KO)

More...
KOi
K07604

Identification of Orthologs from Complete Genome Data

More...
OMAi
ICLRSGT

Database of Orthologous Groups

More...
OrthoDBi
805081at2759

Database for complete collections of gene phylogenies

More...
PhylomeDBi
A6BLY7

TreeFam database of animal gene trees

More...
TreeFami
TF332742

Family and domain databases

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR001664 IF
IPR039008 IF_rod_dom
IPR002957 Keratin_I

The PANTHER Classification System

More...
PANTHERi
PTHR23239 PTHR23239, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00038 Filament, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR01248 TYPE1KERATIN

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM01391 Filament, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS51842 IF_ROD_2, 1 hit

<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>.<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.

A6BLY7-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MSLRFSGGSR HVGIQSGSLR PPSGGAGFAG SSVAGGSVAG SGFSWALGGT
60 70 80 90 100
LGSAPGGSHA TGALGNVSGV CFIGSEGGLL SGNEKVTMQN LNNRLASYLD
110 120 130 140 150
NVKALEEANS ELERKIKTWH EKYGPGSCRG LDRDYSKYHL TIEDLKSKII
160 170 180 190 200
SSTAANANII LQIDNARLAA DDFRLKYENE LTLHQNVEAD INGLRRVLDE
210 220 230 240 250
LTLCRTDQEL QYESLSEEMT YLKKNHEEEM KVLQCAAGGN VNVEMNAAPG
260 270 280 290 300
VDLTVLLNNM RAEYEALAEQ NRRDAEAWFQ EKSATLQQQI SNDLGAATSA
310 320 330 340 350
RTELTELKRS LQTLEIELQS LSATKHSLEC SLAETEGNYC SQLAQIQAQI
360 370 380 390 400
SALEEQLHQV RTETEGQKLE HEQLLDIKAH LEKEIETYCR LIDGDENSCS
410 420 430 440 450
VSKGFESGTS GNSPKDVSKT TLVKTVVEEI DQRGKVLSSR IHSIEEKMSK
460
MSNGKAEQRV PF
Length:462
Mass (Da):50,346
Last modified:July 24, 2007 - 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:i8021DAC2A1E91423
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
AB288231 mRNA Translation: BAF64536.1
AK014642 mRNA Translation: BAB29485.1
AL591165 Genomic DNA No translation available.

The Consensus CDS (CCDS) project

More...
CCDSi
CCDS48906.1

NCBI Reference Sequences

More...
RefSeqi
NP_081850.1, NM_027574.1

UniGene gene-oriented nucleotide sequence clusters

More...
UniGenei
Mm.180256

Genome annotation databases

Ensembl eukaryotic genome annotation project

More...
Ensembli
ENSMUST00000006963; ENSMUSP00000006963; ENSMUSG00000055937

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
70843

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
mmu:70843

UCSC genome browser

More...
UCSCi
uc007liq.2 mouse

<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
AB288231 mRNA Translation: BAF64536.1
AK014642 mRNA Translation: BAB29485.1
AL591165 Genomic DNA No translation available.
CCDSiCCDS48906.1
RefSeqiNP_081850.1, NM_027574.1
UniGeneiMm.180256

3D structure databases

ProteinModelPortaliA6BLY7
SMRiA6BLY7
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi10090.ENSMUSP00000006963

PTM databases

iPTMnetiA6BLY7
PhosphoSitePlusiA6BLY7

Proteomic databases

EPDiA6BLY7
jPOSTiA6BLY7
MaxQBiA6BLY7
PaxDbiA6BLY7
PeptideAtlasiA6BLY7
PRIDEiA6BLY7

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsembliENSMUST00000006963; ENSMUSP00000006963; ENSMUSG00000055937
GeneIDi70843
KEGGimmu:70843
UCSCiuc007liq.2 mouse

Organism-specific databases

Comparative Toxicogenomics Database

More...
CTDi
162605
MGIiMGI:1918093 Krt28

Phylogenomic databases

eggNOGiENOG410IFTF Eukaryota
ENOG410Y9IV LUCA
GeneTreeiENSGT00940000162192
HOGENOMiHOG000230975
HOVERGENiHBG013015
InParanoidiA6BLY7
KOiK07604
OMAiICLRSGT
OrthoDBi805081at2759
PhylomeDBiA6BLY7
TreeFamiTF332742

Enzyme and pathway databases

ReactomeiR-MMU-6805567 Keratinization
R-MMU-6809371 Formation of the cornified envelope

Miscellaneous databases

Protein Ontology

More...
PROi
PR:A6BLY7

The Stanford Online Universal Resource for Clones and ESTs

More...
SOURCEi
Search...

Gene expression databases

BgeeiENSMUSG00000055937 Expressed in 33 organ(s), highest expression level in skin of back
GenevisibleiA6BLY7 MM

Family and domain databases

InterProiView protein in InterPro
IPR001664 IF
IPR039008 IF_rod_dom
IPR002957 Keratin_I
PANTHERiPTHR23239 PTHR23239, 1 hit
PfamiView protein in Pfam
PF00038 Filament, 1 hit
PRINTSiPR01248 TYPE1KERATIN
SMARTiView protein in SMART
SM01391 Filament, 1 hit
PROSITEiView protein in PROSITE
PS51842 IF_ROD_2, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
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 nameiK1C28_MOUSE
<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: A6BLY7
Secondary accession number(s): Q9D637
<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: December 4, 2007
Last sequence update: July 24, 2007
Last modified: February 13, 2019
This is version 94 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, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families
  2. MGD cross-references
    Mouse Genome Database (MGD) cross-references in UniProtKB/Swiss-Prot
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