Skip Header

 
Contribute Send feedback

Reviewed, UniProtKB/Swiss-Prot Q8TEW0 (PARD3_HUMAN)

Last modified September 2, 2008. Version 68. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (6) | Third-party data | Customize display text xml rdf/xml gff fasta
Names and origin · Protein attributes · General annotation (Comments) · Ontologies · Binary interactions · Alternative products · Sequence annotation (Features) · Sequences · References · Cross-references · Entry information · Relevant documents

Names and origin

Protein namesRecommended name:
    Partitioning-defective 3 homolog
      Short name=PARD-3
      Short name=PAR-3
Alternative name(s):
    Atypical PKC isotype-specific-interacting protein
      Short name=ASIP
    CTCL tumor antigen se2-5
    PAR3-alpha
Gene names
Name: PARD3
Synonyms: PAR3, PAR3A
OrganismHomo sapiens (Human)
Taxonomic identifier9606 [NCBI]
Taxonomic lineageEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo

Protein attributes

Sequence length1356 AA.
Sequence statusComplete.
Sequence processingThe displayed sequence is not processed.
Protein existenceEvidence at protein level.

General annotation (Comments)

Function

Adapter protein involved in asymmetrical cell division and cell polarization processes. Seems to play a central role in the formation of epithelial tight junctions. Association with PARD6B may prevent the interaction of PARD3 with F11R/JAM1, thereby preventing tight junction assembly. The PARD6-PARD3 complex links GTP-bound Rho small GTPases to atypical protein kinase C proteins.

Subunit structure

Interacts with PARD6A and PARD6B. Isoform 2, but not at least isoform 3 interacts with PRKCZ. Interacts with PRCKI By similarity. Part of a complex with PARD6A or PARD6B, PRKCI or PRKCZ and CDC42 or RAC1. Interacts with F11R/JAM1 By similarity. Component of a complex whose core is composed of ARHGAP17, AMOT, MPP5/PALS1, INADL/PATJ and PARD3/PAR3. Interacts with LIMK2.

Subcellular location

Intracytoplasmic membrane. Cell junctiontight junction. Cell membrane. Note= Partially localized along the cell-cell contact region. Colocalizes with PARD6A and PRKCI at epithelial tight junctions.

Tissue specificity

Widely expressed.

Post-translational modification

Phosphorylated by PRKCZ. EGF-induced Tyr-1127 phosphorylation mediates dissociation from LIMK2.

Miscellaneous

Antibodies against PARD3 are present in sera from patients with cutaneous T-cell lymphomas.

Sequence similarities

Belongs to the PAR3 family.

Contains 3 PDZ (DHR) domains.

Sequence caution

The sequence AAG33676.1 differs from that shown. Reason: Miscellaneous discrepancy. Contaminating sequence. Potential poly-A sequence.

Alternative products

This entry describes 10 isoforms produced by alternative splicing. [Align] [Select]
Isoform 1 (identifier: Q8TEW0-1)

Also known as: A;

This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.
Isoform 2 (identifier: Q8TEW0-2)

Also known as: B; La;

The sequence of this isoform differs from the canonical sequence as follows:
     740-742: Missing.
Isoform 3 (identifier: Q8TEW0-3)

Also known as: C;

The sequence of this isoform differs from the canonical sequence as follows:
     195-238: Missing.
     557-569: Missing.
     740-742: Missing.
     827-856: Missing.
Isoform 4 (identifier: Q8TEW0-4)

Also known as: D;

The sequence of this isoform differs from the canonical sequence as follows:
     1025-1061: Missing.
Isoform 5 (identifier: Q8TEW0-5)

Also known as: E;

The sequence of this isoform differs from the canonical sequence as follows:
     195-238: Missing.
     557-569: Missing.
     740-742: Missing.
     857-857: I → S
     858-872: Missing.
     1025-1061: Missing.
Isoform 6 (identifier: Q8TEW0-6)

Also known as: F;

The sequence of this isoform differs from the canonical sequence as follows:
     557-569: Missing.
     740-742: Missing.
     827-856: Missing.
Isoform 7 (identifier: Q8TEW0-7)

Also known as: Lb;

The sequence of this isoform differs from the canonical sequence as follows:
     557-569: Missing.
     740-742: Missing.
     827-856: Missing.
     1025-1061: Missing.
Isoform 8 (identifier: Q8TEW0-8)

Also known as: Sa;

The sequence of this isoform differs from the canonical sequence as follows:
     740-742: Missing.
     1025-1034: RFGKHRKDDK → SLAKLKPEKR
     1035-1356: Missing.
Isoform 9 (identifier: Q8TEW0-9)

Also known as: Sb;

The sequence of this isoform differs from the canonical sequence as follows:
     557-569: Missing.
     740-742: Missing.
     827-856: Missing.
     1025-1034: RFGKHRKDDK → SLAKLKPEKR
     1035-1356: Missing.
Isoform 10 (identifier: Q8TEW0-10)

The sequence of this isoform differs from the canonical sequence as follows:
     740-742: Missing.
     827-856: Missing.
     857-858: IA → T
     1025-1034: RFGKHRKDDK → SLAKLKPEKR
     1035-1356: Missing.
Notes: No experimental confirmation available.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical view

Molecule processing

Chain1 – 13561356Partitioning-defective 3 homolog

Regions

Domain271 – 35989PDZ 1
Domain461 – 54686PDZ 2
Domain590 – 67788PDZ 3
Region712 – 936225Interacts with PRKCZ By similarity
Coiled coil1049 – 107729 Potential
Coiled coil1151 – 117424 Potential
Coiled coil1201 – 122424 Potential
Coiled coil1280 – 130122 Potential
Compositional bias984 – 104259Lys-rich

Amino acid modifications

Modified residue1431Phosphoserine
Modified residue1441Phosphoserine
Modified residue3831Phosphoserine
Modified residue4891Phosphotyrosine
Modified residue6951Phosphoserine
Modified residue7151Phosphoserine
Modified residue7171Phosphoserine
Modified residue7281Phosphoserine
Modified residue8271Phosphoserine By similarity
Modified residue8521Phosphoserine
Modified residue10801Phosphotyrosine By similarity
Modified residue11271Phosphotyrosine

Natural variations

Alternative sequence195 – 23844Missing in isoform 3 and isoform 5.
Alternative sequence557 – 56913Missing in isoform 3, isoform 5, isoform 6, isoform 7 and isoform 9.
Alternative sequence740 – 7423Missing in isoform 2, isoform 3, isoform 5, isoform 6, isoform 7, isoform 8, isoform 9 and isoform 10.
Alternative sequence827 – 85630Missing in isoform 3, isoform 6, isoform 7, isoform 9 and isoform 10.
Alternative sequence857 – 8582IA → T in isoform 10.
Alternative sequence8571I → S in isoform 5.
Alternative sequence858 – 87215Missing in isoform 5.
Alternative sequence1025 – 106137Missing in isoform 4, isoform 5 and isoform 7.
Alternative sequence1025 – 103410RFGKHRKDDK → SLAKLKPEKR in isoform 8, isoform 9 and isoform 10.
Alternative sequence1035 – 1356322Missing in isoform 8, isoform 9 and isoform 10.
Natural variant1071E → D: dbSNP rs1436731.

Experimental info

Mutagenesis11271Y → F: Delayed epithelial tight junction assembly
Sequence conflict1901T → A in BAB55330. Ref.5
Sequence conflict2331L → Q in BAB55330. Ref.5
Sequence conflict5941N → S in BAB55330. Ref.5
Sequence conflict996 – 10005GKEKK → VELHE in BAA91366. Ref.5

Sequences

Sequence LengthMass (Da)Tools
Isoform 1 (A) [UniParc].

Last modified May 16, 2003. Version 2.
Checksum: A4FD3F4F9AD8B92A

FASTA1,356151,423
        10         20         30         40         50         60 
MKVTVCFGRT RVVVPCGDGH MKVFSLIQQA VTRYRKAIAK DPNYWIQVHR LEHGDGGILD 

        70         80         90        100        110        120 
LDDILCDVAD DKDRLVAVFD EQDPHHGGDG TSASSTGTQS PEIFGSELGT NNVSAFQPYQ 

       130        140        150        160        170        180 
ATSEIEVTPS VLRANMPLHV RRSSDPALIG LSTSVSDSNF SSEEPSRKNP TRWSTTAGFL 

       190        200        210        220        230        240 
KQNTAGSPKT CDRKKDENYR SLPRDTSNWS NQFQRDNARS SLSASHPMVG KWLEKQEQDE 

       250        260        270        280        290        300 
DGTEEDNSRV EPVGHADTGL EHIPNFSLDD MVKLVEVPND GGPLGIHVVP FSARGGRTLG 

       310        320        330        340        350        360 
LLVKRLEKGG KAEHENLFRE NDCIVRINDG DLRNRRFEQA QHMFRQAMRT PIIWFHVVPA 

       370        380        390        400        410        420 
ANKEQYEQLS QSEKNNYYSS RFSPDSQYID NRSVNSAGLH TVQRAPRLNH PPEQIDSHSR 

       430        440        450        460        470        480 
LPHSAHPSGK PPSAPASAPQ NVFSTTVSSG YNTKKIGKRL NIQLKKGTEG LGFSITSRDV 

       490        500        510        520        530        540 
TIGGSAPIYV KNILPRGAAI QDGRLKAGDR LIEVNGVDLV GKSQEEVVSL LRSTKMEGTV 

       550        560        570        580        590        600 
SLLVFRQEDA FHPRELNAEP SQMQIPKETK AEDEDIVLTP DGTREFLTFE VPLNDSGSAG 

       610        620        630        640        650        660 
LGVSVKGNRS KENHADLGIF VKSIINGGAA SKDGRLRVND QLIAVNGESL LGKTNQDAME 

       670        680        690        700        710        720 
TLRRSMSTEG NKRGMIQLIV ARRISKCNEL KSPGSPPGPE LPIETALDDR ERRISHSLYS 

       730        740        750        760        770        780 
GIEGLDESPS RNAALSRIMG ESGKYQLSPT VNMPQDDTVI IEDDRLPVLP PHLSDQSSSS 

       790        800        810        820        830        840 
SHDDVGFVTA DAGTWAKAAI SDSADCSLSP DVDPVLAFQR EGFGRQSMSE KRTKQFSDAS 

       850        860        870        880        890        900 
QLDFVKTRKS KSMDLGIADE TKLNTVDDQK AGSPSRDVGP SLGLKKSSSL ESLQTAVAEV 

       910        920        930        940        950        960 
TLNGDIPFHR PRPRIIRGRG CNESFRAAID KSYDKPAVDD DDEGMETLEE DTEESSRSGR 

       970        980        990       1000       1010       1020 
ESVSTASDQP SHSLERQMNG NQEKGDKTDR KKDKTGKEKK KDRDKEKDKM KAKKGMLKGL 

      1030       1040       1050       1060       1070       1080 
GDMFRFGKHR KDDKIEKTGK IKIQESFTSE EERIRMKQEQ ERIQAKTREF RERQARERDY 

      1090       1100       1110       1120       1130       1140 
AEIQDFHRTF GCDDELMYGG VSSYEGSMAL NARPQSPREG HMMDALYAQV KKPRNSKPSP 

      1150       1160       1170       1180       1190       1200 
VDSNRSTPSN HDRIQRLRQE FQQAKQDEDV EDRRRTYSFE QPWPNARPAT QSGRHSVSVE 

      1210       1220       1230       1240       1250       1260 
VQMQRQRQEE RESSQQAQRQ YSSLPRQSRK NASSVSQDSW EQNYSPGEGF QSAKENPRYS 

      1270       1280       1290       1300       1310       1320 
SYQGSRNGYL GGHGFNARVM LETQELLRQE QRRKEQQMKK QPPSEGPSNY DSYKKVQDPS 

      1330       1340       1350 
YAPPKGPFRQ DVPPSPSQVA RLNRLQTPEK GRPFYS 

« Hide

Isoform 2 (B) (La) [UniParc].

Checksum: BC531577B9C31AE3
Show »

1,353151,150
Isoform 3 (C) [UniParc].

Checksum: 92DF51B68081A4A2
Show »

1,266141,072
Isoform 4 (D) [UniParc].

Checksum: F5FBF3CE4E67163B
Show »

1,319146,877
Isoform 5 (E) [UniParc].

Checksum: C3C156C8811D49C2
Show »

1,244138,332
Isoform 6 (F) [UniParc].

Checksum: 57361092A273AC60
Show »

1,310146,276
Isoform 7 (Lb) [UniParc].

Checksum: 53C1A94D8CB7341E
Show »

1,273141,730