Q8TCS8 (PNPT1_HUMAN) Reviewed, UniProtKB/Swiss-Prot
Last modified
January 25, 2012.
Version 94.
History...
Names·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
| Protein names | Recommended name: Polyribonucleotide nucleotidyltransferase 1, mitochondrial EC=2.7.7.8 Alternative name(s): 3'-5' RNA exonuclease OLD35 PNPase old-35 Polynucleotide phosphorylase 1 Short name=PNPase 1 Polynucleotide phosphorylase-like protein | ||||
| Gene names |
| ||||
| Organism | Homo sapiens (Human) | ||||
| Taxonomic identifier | 9606 [NCBI] | ||||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo |
Protein attributes
| Sequence length | 783 AA. |
| Sequence status | Complete. |
| Sequence processing | The displayed sequence is further processed into a mature form. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| Function | RNA-binding protein implicated in numerous RNA metabolic processes. Hydrolyzes single-stranded polyribonucleotides processively in the 3'-to-5' direction. Mitochondrial intermembrane factor with RNA-processing exoribonulease activity. Component of the mitochondrial degradosome (mtEXO) complex, that degrades 3' overhang double-stranded RNA with a 3'-to-5' directionality in an ATP-dependent manner. Required for correct processing and polyadenylation of mitochondrial mRNAs. Plays a role as a cytoplasmic RNA import factor that mediates the translocation of small RNA components, like the 5S RNA, the RNA subunit of ribonuclease P and the mitochondrial RNA-processing (MRP) RNA, into the mitochondrial matrix. Plays a role in mitochondrial morphogenesis and respiration; regulates the expression of the electron transport chain (ETC) components at the mRNA and protein levels. In the cytoplasm, shows a 3'-to-5' exoribonuclease mediating mRNA degradation activity; degrades c-myc mRNA upon treatment with IFNB1/IFN-beta, resulting in a growth arrest in melanoma cells. Regulates the stability of specific mature miRNAs in melanoma cells; specifically and selectively degrades miR-221, preferentially. Plays also a role in RNA cell surveillance by cleaning up oxidized RNAs. Binds to the RNA subunit of ribonuclease P, MRP RNA and miR-221 microRNA. Ref.2 Ref.7 Ref.8 Ref.9 Ref.10 Ref.12 Ref.15 Ref.16 Ref.17 Ref.18 Ref.21 Ref.22 |
| Catalytic activity | RNA(n+1) + phosphate = RNA(n) + a nucleoside diphosphate. |
| Subunit structure | Homotrimer; in free form. Homooligomer. Component of the mitochondrial degradosome (mtEXO) complex which is a heteropentamer containing 2 copies of SUPV3L1 and 3 copies of PNPT1. Interacts with TCL1A; the interaction has no effect on PNPT1 exonuclease activity. Ref.12 Ref.18 Ref.21 |
| Subcellular location | Cytoplasm. Mitochondrion. Mitochondrion intermembrane space; Peripheral membrane protein Ref.8 Ref.9 Ref.11. |
| Induction | Up-regulated in cells upon senescence and terminal differentiation. Up-regulated after treatment with IFNB1/IFN-beta. Ref.2 Ref.10 Ref.11 |
| Post-translational modification | Phosphorylated upon DNA damage, probably by ATM or ATR. Ref.13 Ref.14 Ref.19 |
| Sequence similarities | Belongs to the polyribonucleotide nucleotidyltransferase family. Contains 1 KH domain. Contains 1 S1 motif domain. |
Ontologies
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||
Molecule processing | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Transit peptide | 1 – 45 | 45 | Mitochondrion Potential | ||||||
| Chain | 46 – 783 | 738 | Polyribonucleotide nucleotidyltransferase 1, mitochondrial | PRO_0000024751 | |||||
Regions | |||||||||
| Domain | 605 – 664 | 60 | KH | ||||||
| Domain | 679 – 750 | 72 | S1 motif | ||||||
Amino acid modifications | |||||||||
| Modified residue | 123 | 1 | Phosphothreonine Ref.13 | ||||||
| Modified residue | 124 | 1 | Phosphoserine Ref.13 | ||||||
| Modified residue | 264 | 1 | N6-acetyllysine Ref.20 | ||||||
| Modified residue | 285 | 1 | N6-acetyllysine Ref.20 | ||||||
| Modified residue | 289 | 1 | N6-acetyllysine Ref.20 | ||||||
| Modified residue | 356 | 1 | Phosphotyrosine Ref.19 | ||||||
| Modified residue | 591 | 1 | N6-acetyllysine Ref.20 | ||||||
| Modified residue | 758 | 1 | Phosphothreonine Ref.14 | ||||||
| Modified residue | 776 | 1 | Phosphoserine Ref.14 | ||||||
| Modified residue | 782 | 1 | Phosphoserine Ref.14 | ||||||
Natural variations | |||||||||
| Natural variant | 121 | 1 | I → V. Ref.1 Ref.2 Ref.4 Corresponds to variant rs782572 [ dbSNP | Ensembl ]. | VAR_027787 | |||||
| Natural variant | 230 | 1 | E → Q. Corresponds to variant rs34928857 [ dbSNP | Ensembl ]. | VAR_050610 | |||||
| Natural variant | 590 | 1 | N → D. Corresponds to variant rs7594497 [ dbSNP | Ensembl ]. | VAR_027788 | |||||
Experimental info | |||||||||
| Mutagenesis | 135 | 1 | D → G: Inhibits poly(A) polymerase and RNA degradation activities. Inhibits the import or stabilization of RNase P RNA into the mitochondrial matrix. Does not inhibit homotrimerization activity. Ref.21 | ||||||
| Mutagenesis | 445 – 446 | 2 | RR → EE: Stimulates in vitro poly(A) polymerase activity. Inhibits RNA degradation activity. Does not inhibit the import or stabilization of RNase P RNA into the mitochondrial matrix. Does not inhibit homotrimerization activity. | ||||||
| Mutagenesis | 484 | 1 | S → A: Inhibits poly(A) polymerase and RNA degradation activities. Does not inhibit the import or stabilization of RNase P RNA into the mitochondrial matrix. Does not inhibit homotrimerization activity. Ref.21 | ||||||
| Mutagenesis | 544 | 1 | D → A: Stimulates in vitro poly(A) polymerase activity. Inhibits RNA degradation activity. Inhibits the import or stabilization of RNase P RNA into the mitochondrial matrix. Does not inhibit homotrimerization activity. Ref.21 | ||||||
| Sequence conflict | 656 | 1 | A → V in AAK13047. Ref.2 | ||||||
Sequences
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References
| « Hide 'large scale' references | |
| [1] | "Protein-protein interactions between human exosome components support the assembly of RNase PH-type subunits into a six-membered PNPase-like ring." Raijmakers R., Vree Egberts W., van Venrooij W.J., Pruijn G.J.M. J. Mol. Biol. 323:653-663(2002) [PubMed: 12419256] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA], VARIANT VAL-121. Tissue: Teratocarcinoma. |
| [2] | "Identification and cloning of human polynucleotide phosphorylase, hPNPase (old-35), in the context of terminal differentiation and cellular senescence." Leszczyniecka M., Kang D.-C., Sarkar D., Su Z.-Z., Holmes M., Valerie K., Fisher P.B. Proc. Natl. Acad. Sci. U.S.A. 99:16636-16641(2002) [PubMed: 12473748] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA], VARIANT VAL-121, FUNCTION, INDUCTION. Tissue: Melanoma. |
| [3] | "Generation and annotation of the DNA sequences of human chromosomes 2 and 4." Hillier L.W., Graves T.A., Fulton R.S., Fulton L.A., Pepin K.H., Minx P., Wagner-McPherson C., Layman D., Wylie K., Sekhon M., Becker M.C., Fewell G.A., Delehaunty K.D., Miner T.L., Nash W.E., Kremitzki C., Oddy L., Du H. Wilson R.K.Nature 434:724-731(2005) [PubMed: 15815621] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. |
| [4] | "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)." The MGC Project Team Genome Res. 14:2121-2127(2004) [PubMed: 15489334] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA], VARIANT VAL-121. Tissue: Cervix, Skin and Urinary bladder. |
| [5] | "Immunogenic antigens eliciting humoral immune response identified in leukemia cells by SEREX method." Takahashi H., Furukawa T., Yano T., Takizawa J., Abe T., Narita M., Fuse I., Koyama S., Takahashi M., Aizawa Y. Submitted (MAY-2003) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 509-783. |
| [6] | "The full-ORF clone resource of the German cDNA consortium." Bechtel S., Rosenfelder H., Duda A., Schmidt C.P., Ernst U., Wellenreuther R., Mehrle A., Schuster C., Bahr A., Bloecker H., Heubner D., Hoerlein A., Michel G., Wedler H., Koehrer K., Ottenwaelder B., Poustka A., Wiemann S., Schupp I. BMC Genomics 8:399-399(2007) [PubMed: 17974005] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] OF 538-783. Tissue: Melanoma. |
| [7] | "Down-regulation of Myc as a potential target for growth arrest induced by human polynucleotide phosphorylase (hPNPaseold-35) in human melanoma cells." Sarkar D., Leszczyniecka M., Kang D.C., Lebedeva I.V., Valerie K., Dhar S., Pandita T.K., Fisher P.B. J. Biol. Chem. 278:24542-24551(2003) [PubMed: 12721301] [Abstract] Cited for: FUNCTION. |
| [8] | "Human polynucleotide phosphorylase, hPNPase, is localized in mitochondria." Piwowarski J., Grzechnik P., Dziembowski A., Dmochowska A., Minczuk M., Stepien P.P. J. Mol. Biol. 329:853-857(2003) [PubMed: 12798676] [Abstract] Cited for: FUNCTION, SUBCELLULAR LOCATION. |
| [9] | "Defining the domains of human polynucleotide phosphorylase (hPNPaseOLD-35) mediating cellular senescence." Sarkar D., Park E.S., Emdad L., Randolph A., Valerie K., Fisher P.B. Mol. Cell. Biol. 25:7333-7343(2005) [PubMed: 16055741] [Abstract] Cited for: FUNCTION, SUBCELLULAR LOCATION. |
| [10] | "Defining the mechanism by which IFN-beta dowregulates c-myc expression in human melanoma cells: pivotal role for human polynucleotide phosphorylase (hPNPaseold-35)." Sarkar D., Park E.S., Fisher P.B. Cell Death Differ. 13:1541-1553(2006) [PubMed: 16410805] [Abstract] Cited for: FUNCTION, INDUCTION. |
| [11] | "Mammalian polynucleotide phosphorylase is an intermembrane space RNase that maintains mitochondrial homeostasis." Chen H.W., Rainey R.N., Balatoni C.E., Dawson D.W., Troke J.J., Wasiak S., Hong J.S., McBride H.M., Koehler C.M., Teitell M.A., French S.W. Mol. Cell. Biol. 26:8475-8487(2006) [PubMed: 16966381] [Abstract] Cited for: SUBCELLULAR LOCATION, INDUCTION. |
| [12] | "The TCL1 oncoprotein binds the RNase PH domains of the PNPase exoribonuclease without affecting its RNA degrading activity." French S.W., Dawson D.W., Chen H.-W., Rainey R.N., Sievers S.A., Balatoni C.E., Wong L., Troke J.J., Nguyen M.T.N., Koehler C.M., Teitell M.A. Cancer Lett. 248:198-210(2007) [PubMed: 16934922] [Abstract] Cited for: FUNCTION, INTERACTION WITH TCL1A, IDENTIFICATION BY MASS SPECTROMETRY. |
| [13] | "Improved titanium dioxide enrichment of phosphopeptides from HeLa cells and high confident phosphopeptide identification by cross-validation of MS/MS and MS/MS/MS spectra." Yu L.-R., Zhu Z., Chan K.C., Issaq H.J., Dimitrov D.S., Veenstra T.D. J. Proteome Res. 6:4150-4162(2007) [PubMed: 17924679] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT THR-123 AND SER-124, MASS SPECTROMETRY. Tissue: Cervix carcinoma. |
| [14] | "ATM and ATR substrate analysis reveals extensive protein networks responsive to DNA damage." Matsuoka S., Ballif B.A., Smogorzewska A., McDonald E.R. III, Hurov K.E., Luo J., Bakalarski C.E., Zhao Z., Solimini N., Lerenthal Y., Shiloh Y., Gygi S.P., Elledge S.J. Science 316:1160-1166(2007) [PubMed: 17525332] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT THR-758; SER-776 AND SER-782, MASS SPECTROMETRY. Tissue: Embryonic kidney. |
| [15] | "Human polynucleotide phosphorylase reduces oxidative RNA damage and protects HeLa cell against oxidative stress." Wu J., Li Z. Biochem. Biophys. Res. Commun. 372:288-292(2008) [PubMed: 18501193] [Abstract] Cited for: FUNCTION. |
| [16] | "Analysis of the human polynucleotide phosphorylase (PNPase) reveals differences in RNA binding and response to phosphate compared to its bacterial and chloroplast counterparts." Portnoy V., Palnizky G., Yehudai-Resheff S., Glaser F., Schuster G. RNA 14:297-309(2008) [PubMed: 18083836] [Abstract] Cited for: FUNCTION, RNA-BINDING. |
| [17] | "Stable PNPase RNAi silencing: its effect on the processing and adenylation of human mitochondrial RNA." Slomovic S., Schuster G. RNA 14:310-323(2008) [PubMed: 18083837] [Abstract] Cited for: FUNCTION. |
| [18] | "Human mitochondrial SUV3 and polynucleotide phosphorylase form a 330-kDa heteropentamer to cooperatively degrade double-stranded RNA with a 3'-to-5' directionality." Wang D.D., Shu Z., Lieser S.A., Chen P.L., Lee W.H. J. Biol. Chem. 284:20812-20821(2009) [PubMed: 19509288] [Abstract] Cited for: FUNCTION, IDENTIFICATION IN THE MITOCHONDRIAL DEGRADOSOME COMPLEX, HOMOTRIMERIZATION. |
| [19] | "Lys-N and trypsin cover complementary parts of the phosphoproteome in a refined SCX-based approach." Gauci S., Helbig A.O., Slijper M., Krijgsveld J., Heck A.J., Mohammed S. Anal. Chem. 81:4493-4501(2009) [PubMed: 19413330] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT TYR-356, MASS SPECTROMETRY. Tissue: Embryonic kidney. |
| [20] | "Lysine acetylation targets protein complexes and co-regulates major cellular functions." Choudhary C., Kumar C., Gnad F., Nielsen M.L., Rehman M., Walther T., Olsen J.V., Mann M. Science 325:834-840(2009) [PubMed: 19608861] [Abstract] Cited for: ACETYLATION [LARGE SCALE ANALYSIS] AT LYS-264; LYS-285; LYS-289 AND LYS-591, MASS SPECTROMETRY. |
| [21] | "PNPASE regulates RNA import into mitochondria." Wang G., Chen H.W., Oktay Y., Zhang J., Allen E.L., Smith G.M., Fan K.C., Hong J.S., French S.W., McCaffery J.M., Lightowlers R.N., Morse H.C. III, Koehler C.M., Teitell M.A. Cell 142:456-467(2010) [PubMed: 20691904] [Abstract] Cited for: FUNCTION, HOMOTRIMERIZATION, HOMOOLIGOMERIZATION, MUTAGENESIS OF ASP-135; 445-ARG-ARG-446; SER-484 AND ASP-544. |
| [22] | "Human polynucleotide phosphorylase selectively and preferentially degrades microRNA-221 in human melanoma cells." Das S.K., Sokhi U.K., Bhutia S.K., Azab B., Su Z.Z., Sarkar D., Fisher P.B. Proc. Natl. Acad. Sci. U.S.A. 107:11948-11953(2010) [PubMed: 20547861] [Abstract] Cited for: FUNCTION. |
| [23] | "Initial characterization of the human central proteome." Burkard T.R., Planyavsky M., Kaupe I., Breitwieser F.P., Buerckstuemmer T., Bennett K.L., Superti-Furga G., Colinge J. BMC Syst. Biol. 5:17-17(2011) [PubMed: 21269460] [Abstract] Cited for: IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]. |
| + | Additional computationally mapped references. |
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | AJ458465 mRNA. Translation: CAD30289.1. AY027528 mRNA. Translation: AAK13047.1. AC015982 Genomic DNA. Translation: AAY24271.1. BC000862 mRNA. Translation: AAH00862.2. BC005986 mRNA. Translation: AAH05986.1. BC053660 mRNA. Translation: AAH53660.1. AY290863 mRNA. Translation: AAP44472.1. CR749867 mRNA. Translation: CAH18709.1. |
| IPI | IPI00744711. |
| PIR | T50626. |
| RefSeq | NP_149100.2. NM_033109.3. |
| UniGene | Hs.388733. |
3D structure databases | |
| ProteinModelPortal | Q8TCS8. |
| SMR | Q8TCS8. Positions 43-751. |
| ModBase | Search... |
Protein-protein interaction databases | |
| STRING | Q8TCS8. |
PTM databases | |
| PhosphoSite | Q8TCS8. |
Polymorphism databases | |
| DMDM | 115502437. |
2D gel databases | |
| REPRODUCTION-2DPAGE | IPI00291165. |
Proteomic databases | |
| PeptideAtlas | Q8TCS8. |
| PRIDE | Q8TCS8. |
Protocols and materials databases | |
| StructuralBiologyKnowledgebase | Search... |
Genome annotation databases | |
| Ensembl | ENST00000415374; ENSP00000393953; ENSG00000138035. ENST00000447944; ENSP00000400646; ENSG00000138035. ENST00000450096; ENSP00000402488; ENSG00000138035. |
| GeneID | 87178. |
| KEGG | hsa:87178. |
| NMPDR | fig|9606.3.peg.17886. |
| UCSC | uc002rzf.2. human. |
Organism-specific databases | |
| CTD | 87178. |
| GeneCards | GC02M055861. |
| H-InvDB | HIX0023979. |
| HGNC | HGNC:23166. PNPT1. |
| HPA | HPA034603. |
| MIM | 610316. gene. |
| neXtProt | NX_Q8TCS8. |
| PharmGKB | PA134915354. |
| GenAtlas | Search... |
Phylogenomic databases | |
| eggNOG | prNOG08894. |
| GeneTree | ENSGT00390000014001. |
| HOVERGEN | HBG053625. |
| InParanoid | Q8TCS8. |
| OMA | IYAVFTD. |
| OrthoDB | EOG4T4CTT. |
| PhylomeDB | Q8TCS8. |
Enzyme and pathway databases | |
| BRENDA | 2.7.7.8. 2681. |
Gene expression databases | |
| ArrayExpress | Q8TCS8. |
| Bgee | Q8TCS8. |
| CleanEx | HS_PNPT1. |
| Genevestigator | Q8TCS8. |
| GermOnline | ENSG00000138035. Homo sapiens. |
Family and domain databases | |
| InterPro | IPR001247. ExoRNase_PH_dom1. IPR015847. ExoRNase_PH_dom2. IPR004087. KH. IPR004088. KH_type_1. IPR018111. KH_type_1_subgr. IPR012340. NA-bd_OB-fold. IPR016027. NA-bd_OB-fold-like. IPR012162. PNPase. IPR015848. PNPase_PH_RNA-bd_bac/org-type. IPR003029. Rbsml_prot_S1_RNA-bd_dom. IPR020568. Ribosomal_S5_D2-typ_fold. IPR022967. RNA-binding_domain_S1. [Graphical view] |
| Gene3D | G3DSA:2.40.50.140. OB_NA_bd_sub. 1 hit. G3DSA:1.10.10.400. PNPase_PH_RNA-bd_bac/org-type. 1 hit. |
| KO | K00962. |
| PANTHER | PTHR11252. PNPase. 1 hit. |
| Pfam | PF00013. KH_1. 1 hit. PF03726. PNPase. 1 hit. PF01138. RNase_PH. 2 hits. PF03725. RNase_PH_C. 2 hits. PF00575. S1. 1 hit. [Graphical view] |
| PIRSF | PIRSF005499. PNPase. 1 hit. |
| SMART | SM00322. KH. 1 hit. SM00316. S1. 1 hit. [Graphical view] |
| SUPFAM | SSF46915. 3_ExoRNase. 1 hit. SSF55666. 3_ExoRNase. 2 hits. SSF50249. Nucleic_acid_OB. 1 hit. SSF54211. Ribosomal_S5_D2-typ_fold. 2 hits. |
| TIGRFAMs | TIGR03591. Polynuc_phos. 1 hit. |
| PROSITE | PS50084. KH_TYPE_1. 1 hit. PS50126. S1. 1 hit. [Graphical view] |
| ProtoNet | Search... |
Other | |
| NextBio | 76209. |
| SOURCE | Search... |
Entry information
| Entry name | PNPT1_HUMAN | ||||||||
| Accession | Primary (citable) accession number: Q8TCS8 Secondary accession number(s): Q53SU0 Q9BVX0 | ||||||||
| Entry history |
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| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Chordata Protein Annotation Program | ||||||||
| Disclaimer | Any 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. | ||||||||
Relevant documents
| Human chromosome 2 Human chromosome 2: entries, gene names and cross-references to MIM |
| Human entries with polymorphisms or disease mutations List of human entries with polymorphisms or disease mutations |
| Human polymorphisms and disease mutations Index of human polymorphisms and disease mutations |
| MIM cross-references Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot |
| SIMILARITY comments Index of protein domains and families |

Clusters with