Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.
Protein

Platelet factor 4

Gene

PF4

Organism
Bos taurus (Bovine)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at protein leveli

Functioni

Released during platelet aggregation. Neutralizes the anticoagulant effect of heparin because it binds more strongly to heparin than to the chondroitin-4-sulfate chains of the carrier molecule. Chemotactic for neutrophils and monocytes. Inhibits endothelial cell proliferation.

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionCytokine, Heparin-binding
Biological processChemotaxis

Names & Taxonomyi

Protein namesi
Recommended name:
Platelet factor 4
Short name:
PF-4
Alternative name(s):
C-X-C motif chemokine 4
Gene namesi
Name:PF4
Synonyms:CXCL4, SCYB4
OrganismiBos taurus (Bovine)
Taxonomic identifieri9913 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaLaurasiatheriaCetartiodactylaRuminantiaPecoraBovidaeBovinaeBos
Proteomesi
  • UP000009136 Componenti: Unplaced

Subcellular locationi

GO - Cellular componenti

Keywords - Cellular componenti

Secreted

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001442981 – 88Platelet factor 4Add BLAST88

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Glycosylationi7O-linked (GalNAc...) threonine1 Publication1
Disulfide bondi25 ↔ 51
Disulfide bondi27 ↔ 67
Modified residuei41PhosphoserineBy similarity1

Post-translational modificationi

O-linked glycan consists of Gal-GalNAc disaccharide which is modified with sialic acid residues (microheterogeneity).1 Publication

Keywords - PTMi

Disulfide bond, Glycoprotein, Phosphoprotein, Proteoglycan

Proteomic databases

PRIDEiP02777.

Interactioni

Subunit structurei

Homotetramer.

GO - Molecular functioni

Structurei

Secondary structure

188
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Helixi36 – 38Combined sources3
Beta strandi39 – 45Combined sources7
Beta strandi55 – 60Combined sources6
Beta strandi65 – 68Combined sources4
Beta strandi70 – 72Combined sources3
Helixi74 – 83Combined sources10

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1PLFX-ray2.20A/B/C/D14-83[»]
ProteinModelPortaliP02777.
SMRiP02777.
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiP02777.

Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni76 – 82Heparin-bindingBy similarity7

Sequence similaritiesi

Phylogenomic databases

HOVERGENiHBG107789.
InParanoidiP02777.

Family and domain databases

CDDicd00273. Chemokine_CXC. 1 hit.
InterProiView protein in InterPro
IPR001089. Chemokine_CXC.
IPR018048. Chemokine_CXC_CS.
IPR001811. Chemokine_IL8-like_dom.
IPR033899. CXC_Chemokine_domain.
IPR027222. PF4.
PANTHERiPTHR10179. PTHR10179. 1 hit.
PTHR10179:SF57. PTHR10179:SF57. 1 hit.
PfamiView protein in Pfam
PF00048. IL8. 1 hit.
PRINTSiPR00437. SMALLCYTKCXC.
SMARTiView protein in SMART
SM00199. SCY. 1 hit.
SUPFAMiSSF54117. SSF54117. 1 hit.
PROSITEiView protein in PROSITE
PS00471. SMALL_CYTOKINES_CXC. 1 hit.

Sequencei

Sequence statusi: Complete.

P02777-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
ESSFPATFVP LPADSEGGED EDLQCVCLKT TSGINPRHIS SLEVIGAGTH
60 70 80
CPSPQLLATK KTGRKICLDQ QRPLYKKILK KLLDGDES
Length:88
Mass (Da):9,523
Last modified:July 21, 1986 - v1
Checksum:i9288E16455250FFB
GO

Sequence databases

PIRiA03242. PFBO4.
UniGeneiBt.11581.

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.

Entry informationi

Entry nameiPLF4_BOVIN
AccessioniPrimary (citable) accession number: P02777
Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 21, 1986
Last sequence update: July 21, 1986
Last modified: May 10, 2017
This is version 114 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

3D-structure, Complete proteome, Direct protein sequencing, Reference proteome

Documents

  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  2. SIMILARITY comments
    Index of protein domains and families