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Protein

Carboxypeptidase A4

Gene

CPA4

Organism
Homo sapiens (Human)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at protein leveli

Functioni

Metalloprotease that could be involved in the histone hyperacetylation pathway.1 Publication

Catalytic activityi

Release of a C-terminal amino acid, with preference for -Phe, -Leu, -Ile, -Met, -Tyr and -Val.1 Publication

Cofactori

Zn2+1 PublicationNote: Binds 1 zinc ion per subunit.1 Publication

Enzyme regulationi

Inhibited by interaction with the metallocarboxypeptidase inhibitor (MCPI) from N.versicolor that binds to the catalytic zinc ion.1 Publication

Kineticsi

  1. KM=55.6 µM for 3-(2-furyl)acryloyl-Phe-Phe1 Publication
  2. KM=19.4 µM for 3-(2-furyl)acryloyl-Phe-Leu1 Publication
  3. KM=23.3 µM for 3-(2-furyl)acryloyl-Phe-Ile1 Publication
  4. KM=40.4 µM for 3-(2-furyl)acryloyl-Phe-Met1 Publication
  5. KM=57.3 µM for 3-(2-furyl)acryloyl-Phe-Val1 Publication
  6. KM=0.329 µM for neurotensin1 Publication
  7. KM=9.23 µM for Met-enkephalin-Arg-Phe1 Publication

    pH dependencei

    Optimum pH is 8.5-9.1 Publication

    Sites

    Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
    Metal bindingi181 – 1811Zinc; catalytic1 Publication
    Metal bindingi184 – 1841Zinc; catalytic1 Publication
    Binding sitei239 – 2391SubstrateBy similarity
    Metal bindingi308 – 3081Zinc; catalytic1 Publication
    Binding sitei360 – 3601SubstrateBy similarity
    Active sitei382 – 3821Proton donor/acceptorBy similarity

    GO - Molecular functioni

    • metallocarboxypeptidase activity Source: UniProtKB
    • zinc ion binding Source: InterPro

    GO - Biological processi

    • histone acetylation Source: UniProtKB
    Complete GO annotation...

    Keywords - Molecular functioni

    Carboxypeptidase, Hydrolase, Metalloprotease, Protease

    Keywords - Ligandi

    Metal-binding, Zinc

    Enzyme and pathway databases

    BRENDAi3.4.17.1. 2681.

    Protein family/group databases

    MEROPSiM14.017.

    Names & Taxonomyi

    Protein namesi
    Recommended name:
    Carboxypeptidase A4 (EC:3.4.17.-)
    Alternative name(s):
    Carboxypeptidase A3
    Gene namesi
    Name:CPA4
    Synonyms:CPA3
    ORF Names:UNQ694/PRO1339
    OrganismiHomo sapiens (Human)
    Taxonomic identifieri9606 [NCBI]
    Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo
    Proteomesi
    • UP000005640 Componenti: Chromosome 7

    Organism-specific databases

    HGNCiHGNC:15740. CPA4.

    Subcellular locationi

    GO - Cellular componenti

    Complete GO annotation...

    Keywords - Cellular componenti

    Secreted

    Pathology & Biotechi

    Organism-specific databases

    PharmGKBiPA26819.

    Polymorphism and mutation databases

    BioMutaiCPA4.
    DMDMi61252703.

    PTM / Processingi

    Molecule processing

    Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
    Signal peptidei1 – 1616Sequence analysisAdd
    BLAST
    Propeptidei17 – 11397Activation peptideSequence analysisPRO_0000004357Add
    BLAST
    Chaini114 – 421308Carboxypeptidase A4PRO_0000004358Add
    BLAST

    Amino acid modifications

    Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
    Disulfide bondi250 ↔ 2733 Publications
    Glycosylationi260 – 2601N-linked (GlcNAc...)2 Publications

    Keywords - PTMi

    Disulfide bond, Glycoprotein, Zymogen

    Proteomic databases

    EPDiQ9UI42.
    MaxQBiQ9UI42.
    PaxDbiQ9UI42.
    PeptideAtlasiQ9UI42.
    PRIDEiQ9UI42.

    PTM databases

    iPTMnetiQ9UI42.
    PhosphoSiteiQ9UI42.
    SwissPalmiQ9UI42.

    Expressioni

    Tissue specificityi

    Fetal expression in the adrenal gland, brain, heart, intestine, kidney, liver and lung. Except for fetal brain that shows no imprinting, expression was found preferentially from the maternal allele.

    Inductioni

    Up-regulated by inhibitors of histone dacetylation.1 Publication

    Gene expression databases

    BgeeiENSG00000128510.
    CleanExiHS_CPA3.
    HS_CPA4.
    ExpressionAtlasiQ9UI42. baseline and differential.

    Organism-specific databases

    HPAiHPA021030.

    Interactioni

    Subunit structurei

    Monomer. Interacts with LXN.3 Publications

    Protein-protein interaction databases

    BioGridi119373. 23 interactions.
    DIPiDIP-60558N.
    STRINGi9606.ENSP00000222482.

    Structurei

    Secondary structure

    1
    421
    Legend: HelixTurnBeta strand
    Show more details
    Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
    Beta strandi25 – 295Combined sources
    Helixi34 – 4310Combined sources
    Turni44 – 474Combined sources
    Helixi48 – 503Combined sources
    Beta strandi52 – 554Combined sources
    Beta strandi59 – 624Combined sources
    Beta strandi64 – 685Combined sources
    Helixi70 – 723Combined sources
    Helixi73 – 8210Combined sources
    Beta strandi87 – 926Combined sources
    Helixi94 – 11522Combined sources
    Beta strandi120 – 1223Combined sources
    Helixi126 – 13914Combined sources
    Turni141 – 1433Combined sources
    Beta strandi144 – 1518Combined sources
    Beta strandi157 – 1637Combined sources
    Beta strandi173 – 1786Combined sources
    Helixi185 – 20117Combined sources
    Turni202 – 2043Combined sources
    Helixi206 – 2149Combined sources
    Beta strandi216 – 2216Combined sources
    Helixi225 – 2339Combined sources
    Beta strandi249 – 2513Combined sources
    Helixi255 – 2573Combined sources
    Beta strandi259 – 2624Combined sources
    Beta strandi265 – 2706Combined sources
    Helixi286 – 29813Combined sources
    Beta strandi301 – 3088Combined sources
    Beta strandi310 – 3178Combined sources
    Helixi328 – 34316Combined sources
    Turni344 – 3463Combined sources
    Beta strandi351 – 3544Combined sources
    Helixi355 – 3584Combined sources
    Helixi366 – 3727Combined sources
    Beta strandi377 – 3826Combined sources
    Beta strandi386 – 3894Combined sources
    Helixi390 – 3923Combined sources
    Helixi395 – 3973Combined sources
    Helixi398 – 41720Combined sources

    3D structure databases

    Select the link destinations:
    PDBei
    RCSB PDBi
    PDBji
    Links Updated
    EntryMethodResolution (Å)ChainPositionsPDBsum
    2BO9X-ray1.60A/C114-421[»]
    2BOAX-ray2.20A/B19-421[»]
    2PCUX-ray1.60A116-420[»]
    4A94X-ray1.70A/B112-421[»]
    4BD9X-ray2.20A112-421[»]
    ProteinModelPortaliQ9UI42.
    SMRiQ9UI42. Positions 18-421.
    ModBaseiSearch...
    MobiDBiSearch...

    Miscellaneous databases

    EvolutionaryTraceiQ9UI42.

    Family & Domainsi

    Region

    Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
    Regioni181 – 1844Substrate binding
    Regioni256 – 2572Substrate bindingBy similarity
    Regioni275 – 2762Substrate binding
    Regioni309 – 3102Substrate bindingBy similarity

    Sequence similaritiesi

    Belongs to the peptidase M14 family.Curated

    Keywords - Domaini

    Signal

    Phylogenomic databases

    eggNOGiKOG2650. Eukaryota.
    COG2866. LUCA.
    GeneTreeiENSGT00760000119103.
    HOGENOMiHOG000252967.
    HOVERGENiHBG050815.
    InParanoidiQ9UI42.
    KOiK08637.
    OMAiIQKHGNF.
    OrthoDBiEOG091G0HUI.
    PhylomeDBiQ9UI42.
    TreeFamiTF317197.

    Family and domain databases

    Gene3Di3.30.70.340. 1 hit.
    InterProiIPR003146. M14A_act_pep.
    IPR000834. Peptidase_M14.
    IPR009020. Propept_inh.
    [Graphical view]
    PfamiPF00246. Peptidase_M14. 1 hit.
    PF02244. Propep_M14. 1 hit.
    [Graphical view]
    PRINTSiPR00765. CRBOXYPTASEA.
    SMARTiSM00631. Zn_pept. 1 hit.
    [Graphical view]
    SUPFAMiSSF54897. SSF54897. 1 hit.
    PROSITEiPS00132. CARBOXYPEPT_ZN_1. 1 hit.
    PS00133. CARBOXYPEPT_ZN_2. 1 hit.
    [Graphical view]

    Sequences (2)i

    Sequence statusi: Complete.

    Sequence processingi: The displayed sequence is further processed into a mature form.

    This entry describes 2 isoformsi produced by alternative splicing. AlignAdd to basket

    Isoform 1 (identifier: Q9UI42-1) [UniParc]FASTAAdd to basket

    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.

    « Hide

            10         20         30         40         50
    MRWILFIGAL IGSSICGQEK FFGDQVLRIN VRNGDEISKL SQLVNSNNLK
    60 70 80 90 100
    LNFWKSPSSF NRPVDVLVPS VSLQAFKSFL RSQGLEYAVT IEDLQALLDN
    110 120 130 140 150
    EDDEMQHNEG QERSSNNFNY GAYHSLEAIY HEMDNIAADF PDLARRVKIG
    160 170 180 190 200
    HSFENRPMYV LKFSTGKGVR RPAVWLNAGI HSREWISQAT AIWTARKIVS
    210 220 230 240 250
    DYQRDPAITS ILEKMDIFLL PVANPDGYVY TQTQNRLWRK TRSRNPGSSC
    260 270 280 290 300
    IGADPNRNWN ASFAGKGASD NPCSEVYHGP HANSEVEVKS VVDFIQKHGN
    310 320 330 340 350
    FKGFIDLHSY SQLLMYPYGY SVKKAPDAEE LDKVARLAAK ALASVSGTEY
    360 370 380 390 400
    QVGPTCTTVY PASGSSIDWA YDNGIKFAFT FELRDTGTYG FLLPANQIIP
    410 420
    TAEETWLGLK TIMEHVRDNL Y
    Length:421
    Mass (Da):47,351
    Last modified:March 15, 2005 - v2
    Checksum:i52750CC50B470EC9
    GO
    Isoform 2 (identifier: Q9UI42-2) [UniParc]FASTAAdd to basket

    The sequence of this isoform differs from the canonical sequence as follows:
         96-128: Missing.

    Note: No experimental confirmation available.
    Show »
    Length:388
    Mass (Da):43,570
    Checksum:i088297ACC9D70264
    GO

    Experimental Info

    Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
    Sequence conflicti18 – 181Q → R in AAF23230 (PubMed:10383164).Curated

    Natural variant

    Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
    Natural varianti27 – 271L → F.
    Corresponds to variant rs34587586 [ dbSNP | Ensembl ].
    VAR_048594
    Natural varianti157 – 1571P → T.
    Corresponds to variant rs3735051 [ dbSNP | Ensembl ].
    VAR_020393
    Natural varianti183 – 1831R → L.
    Corresponds to variant rs3735053 [ dbSNP | Ensembl ].
    VAR_048595
    Natural varianti303 – 3031G → C.
    Corresponds to variant rs2171492 [ dbSNP | Ensembl ].
    VAR_020394

    Alternative sequence

    Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
    Alternative sequencei96 – 12833Missing in isoform 2. 1 PublicationVSP_042894Add
    BLAST

    Sequence databases

    Select the link destinations:
    EMBLi
    GenBanki
    DDBJi
    Links Updated
    AF095719 mRNA. Translation: AAF23230.1.
    AY358699 mRNA. Translation: AAQ89062.1.
    AK298550 mRNA. Translation: BAH12812.1.
    AC024085 Genomic DNA. No translation available.
    BC052289 mRNA. Translation: AAH52289.1.
    CCDSiCCDS55163.1. [Q9UI42-2]
    CCDS5818.1. [Q9UI42-1]
    RefSeqiNP_001156918.1. NM_001163446.1. [Q9UI42-2]
    NP_057436.2. NM_016352.3. [Q9UI42-1]
    UniGeneiHs.93764.

    Genome annotation databases

    EnsembliENST00000222482; ENSP00000222482; ENSG00000128510. [Q9UI42-1]
    ENST00000445470; ENSP00000412947; ENSG00000128510. [Q9UI42-2]
    GeneIDi51200.
    KEGGihsa:51200.
    UCSCiuc003vpr.4. human. [Q9UI42-1]

    Keywords - Coding sequence diversityi

    Alternative splicing, Polymorphism

    Cross-referencesi

    Sequence databases

    Select the link destinations:
    EMBLi
    GenBanki
    DDBJi
    Links Updated
    AF095719 mRNA. Translation: AAF23230.1.
    AY358699 mRNA. Translation: AAQ89062.1.
    AK298550 mRNA. Translation: BAH12812.1.
    AC024085 Genomic DNA. No translation available.
    BC052289 mRNA. Translation: AAH52289.1.
    CCDSiCCDS55163.1. [Q9UI42-2]
    CCDS5818.1. [Q9UI42-1]
    RefSeqiNP_001156918.1. NM_001163446.1. [Q9UI42-2]
    NP_057436.2. NM_016352.3. [Q9UI42-1]
    UniGeneiHs.93764.

    3D structure databases

    Select the link destinations:
    PDBei
    RCSB PDBi
    PDBji
    Links Updated
    EntryMethodResolution (Å)ChainPositionsPDBsum
    2BO9X-ray1.60A/C114-421[»]
    2BOAX-ray2.20A/B19-421[»]
    2PCUX-ray1.60A116-420[»]
    4A94X-ray1.70A/B112-421[»]
    4BD9X-ray2.20A112-421[»]
    ProteinModelPortaliQ9UI42.
    SMRiQ9UI42. Positions 18-421.
    ModBaseiSearch...
    MobiDBiSearch...

    Protein-protein interaction databases

    BioGridi119373. 23 interactions.
    DIPiDIP-60558N.
    STRINGi9606.ENSP00000222482.

    Protein family/group databases

    MEROPSiM14.017.

    PTM databases

    iPTMnetiQ9UI42.
    PhosphoSiteiQ9UI42.
    SwissPalmiQ9UI42.

    Polymorphism and mutation databases

    BioMutaiCPA4.
    DMDMi61252703.

    Proteomic databases

    EPDiQ9UI42.
    MaxQBiQ9UI42.
    PaxDbiQ9UI42.
    PeptideAtlasiQ9UI42.
    PRIDEiQ9UI42.

    Protocols and materials databases

    DNASUi51200.
    Structural Biology KnowledgebaseSearch...

    Genome annotation databases

    EnsembliENST00000222482; ENSP00000222482; ENSG00000128510. [Q9UI42-1]
    ENST00000445470; ENSP00000412947; ENSG00000128510. [Q9UI42-2]
    GeneIDi51200.
    KEGGihsa:51200.
    UCSCiuc003vpr.4. human. [Q9UI42-1]

    Organism-specific databases

    CTDi51200.
    GeneCardsiCPA4.
    HGNCiHGNC:15740. CPA4.
    HPAiHPA021030.
    MIMi607635. gene.
    neXtProtiNX_Q9UI42.
    PharmGKBiPA26819.
    GenAtlasiSearch...

    Phylogenomic databases

    eggNOGiKOG2650. Eukaryota.
    COG2866. LUCA.
    GeneTreeiENSGT00760000119103.
    HOGENOMiHOG000252967.
    HOVERGENiHBG050815.
    InParanoidiQ9UI42.
    KOiK08637.
    OMAiIQKHGNF.
    OrthoDBiEOG091G0HUI.
    PhylomeDBiQ9UI42.
    TreeFamiTF317197.

    Enzyme and pathway databases

    BRENDAi3.4.17.1. 2681.

    Miscellaneous databases

    ChiTaRSiCPA4. human.
    EvolutionaryTraceiQ9UI42.
    GeneWikiiCPA4_(gene).
    GenomeRNAii51200.
    PROiQ9UI42.
    SOURCEiSearch...

    Gene expression databases

    BgeeiENSG00000128510.
    CleanExiHS_CPA3.
    HS_CPA4.
    ExpressionAtlasiQ9UI42. baseline and differential.

    Family and domain databases

    Gene3Di3.30.70.340. 1 hit.
    InterProiIPR003146. M14A_act_pep.
    IPR000834. Peptidase_M14.
    IPR009020. Propept_inh.
    [Graphical view]
    PfamiPF00246. Peptidase_M14. 1 hit.
    PF02244. Propep_M14. 1 hit.
    [Graphical view]
    PRINTSiPR00765. CRBOXYPTASEA.
    SMARTiSM00631. Zn_pept. 1 hit.
    [Graphical view]
    SUPFAMiSSF54897. SSF54897. 1 hit.
    PROSITEiPS00132. CARBOXYPEPT_ZN_1. 1 hit.
    PS00133. CARBOXYPEPT_ZN_2. 1 hit.
    [Graphical view]
    ProtoNetiSearch...

    Entry informationi

    Entry nameiCBPA4_HUMAN
    AccessioniPrimary (citable) accession number: Q9UI42
    Secondary accession number(s): B7Z576, Q86UY9
    Entry historyi
    Integrated into UniProtKB/Swiss-Prot: December 13, 2001
    Last sequence update: March 15, 2005
    Last modified: September 7, 2016
    This is version 144 of the entry and version 2 of the sequence. [Complete history]
    Entry statusiReviewed (UniProtKB/Swiss-Prot)
    Annotation programChordata Protein Annotation Program
    DisclaimerAny medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care.

    Miscellaneousi

    Keywords - Technical termi

    3D-structure, Complete proteome, Reference proteome

    Documents

    1. Human chromosome 7
      Human chromosome 7: entries, gene names and cross-references to MIM
    2. Human entries with polymorphisms or disease mutations
      List of human entries with polymorphisms or disease mutations
    3. Human polymorphisms and disease mutations
      Index of human polymorphisms and disease mutations
    4. MIM cross-references
      Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot
    5. PDB cross-references
      Index of Protein Data Bank (PDB) cross-references
    6. Peptidase families
      Classification of peptidase families and list of entries
    7. SIMILARITY comments
      Index of protein domains and families

    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.