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UniProtKB/Swiss-Prot entry P74750


[Entry info] [Name and origin] [References] [Comments] [Cross-references] [Keywords] [Features] [Sequence] [Tools]

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Entry information
Entry name DPO3A_SYNY3
Primary accession number P74750
Secondary accession number P73215
Integrated into Swiss-Prot on December 15, 1998
Sequence was last modified on September 26, 2001 (Sequence version 2)
Annotations were last modified on    July 22, 2008 (Entry version 69)
Name and origin of the protein
Protein name DNA polymerase III subunit alpha [Fragments]
Synonym EC 2.7.7.7
Contains Ssp dnaE intein
Gene names
Name: dnaE-N
OrderedLocusNames: slr0603
and
Name: dnaE-C
OrderedLocusNames: sll1572
From
Synechocystis sp. (strain PCC 6803) [TaxID: 1148] [HAMAP proteome]
Taxonomy Bacteria; Cyanobacteria; Chroococcales; Synechocystis.
Protein existence 1: Evidence at protein level;
References
[1]
NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
DOI=10.1093/dnares/3.3.109; PubMed=8905231 [NCBI, ExPASy, EBI, Israel, Japan]
Kaneko T., Sato S., Kotani H., Tanaka A., Asamizu E., Nakamura Y., Miyajima N., Hirosawa M., Sugiura M., Sasamoto S., Kimura T., Hosouchi T., Matsuno A., Muraki A., Nakazaki N., Naruo K., Okumura S., Shimpo S., Takeuchi C., Wada T., Watanabe A., Yamada M., Yasuda M., Tabata S.;
"Sequence analysis of the genome of the unicellular cyanobacterium Synechocystis sp. strain PCC6803. II. Sequence determination of the entire genome and assignment of potential protein-coding regions.";
DNA Res. 3:109-136(1996).
[2]
CHARACTERIZATION OF SPLIT INTEIN.
DOI=10.1073/pnas.95.16.9226; PubMed=9689062 [NCBI, ExPASy, EBI, Israel, Japan]
Wu H., Hu Z., Liu X.-Q.;
"Protein trans-splicing by a split intein encoded in a split DnaE gene of Synechocystis sp. PCC6803.";
Proc. Natl. Acad. Sci. U.S.A. 95:9226-9231(1998).
[3]
CHARACTERIZATION OF SPLIT INTEIN.
DOI=10.1074/jbc.275.13.9091; PubMed=10734038 [NCBI, ExPASy, EBI, Israel, Japan]
Evans T.C. Jr., Martin D., Kolly R., Panne D., Sun L., Ghosh I., Chen L., Benner J., Liu X.-Q., Xu M.-Q.;
"Protein trans-splicing and cyclization by a naturally split intein from the dnaE gene of Synechocystis species PCC6803.";
J. Biol. Chem. 275:9091-9094(2000).
[4]
CHARACTERIZATION OF SPLIT INTEIN.
DOI=10.1021/bi001786g; PubMed=11170467 [NCBI, ExPASy, EBI, Israel, Japan]
Martin D.D., Xu M.-Q., Evans T.C. Jr.;
"Characterization of a naturally occurring trans-splicing intein from Synechocystis sp. PCC6803.";
Biochemistry 40:1393-1402(2001).
Comments
  • FUNCTION: DNA polymerase III is a complex, multichain enzyme responsible for most of the replicative synthesis in bacteria. This DNA polymerase also exhibits 3' to 5' exonuclease activity. The alpha chain is the DNA polymerase (By similarity).
  • CATALYTIC ACTIVITY: Deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1).
  • SUBUNIT: DNA polymerase III contains a core (composed of alpha, epsilon and theta chains) that associates with a tau subunit. This core dimerizes to form the PolIII' complex. PolIII' associates with the gamma complex (composed of gamma, delta, delta', psi and chi chains) and with the beta chain to form the complete DNA polymerase III complex (By similarity).
  • SUBCELLULAR LOCATION: Cytoplasm (By similarity).
  • PTM: This protein undergoes a protein self splicing that involves a post-translational excision of the intervening region (intein) followed by peptide ligation.
  • MISCELLANEOUS: The intein is a split intein capable of protein trans-splicing. The N- and C-terminal halves of dnaE are encoded by two separate genes located 745 kb apart in the genome and on opposite DNA strands. The dnaE-N product consists of a N-extein sequence followed by a 123-aa intein sequence (Ssp dnaE1), whereas the dnaE-C product consists of a 36-aa intein sequence (Ssp dnaE2) followed by a C-extein sequence. The N- and C-extein sequences together reconstitute a complete DnaE sequence that is interrupted by the intein sequences inside the beta- and tau-binding domains.
  • SIMILARITY: Belongs to the DNA polymerase type-C family. DnaE subfamily.
Copyright
Copyrighted by the UniProt Consortium, see http://www.uniprot.org/terms. Distributed under the Creative Commons Attribution-NoDerivs License.
Cross-references
Sequence databases
EMBL
BA000022; BAA18870.1; ALT_SEQ; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
BA000022; BAA17242.1; ALT_SEQ; Genomic_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
PIR A59016; A59016.
S75328; S75328.
S76958; S76958.
RefSeq NP_440562.1; -.
NP_443058.1; -.
3D structure databases
PDB
1ZD7; X-ray; 1.70 A; A/B=775-933.[ExPASy / RCSB / EBI]
1ZDE; X-ray; 1.95 A; A=768-938.[ExPASy / RCSB / EBI]
Detailed list of linked structures.
PDBsum 1ZD7; -.
1ZDE; -.
ModBase P74750.
Enzyme and pathway databases
BioCyc SSP1148:SLL1572-MON; -.
SSP1148:SLR0603-MON; -.
Family and domain databases
InterPro IPR011708; DNA_pol3_alpha.
IPR003587; Hedgehog_hint_N.
IPR006141; Intein_splicing_site.
IPR004365; NA_bd_OB_tRNA-helicase.
IPR004013; PHP_C.
IPR003141; PHP_N.
IPR004805; PolC_alpha.
Graphical view of domain structure.
Pfam PF07733; DNA_pol3_alpha; 1.
PF02811; PHP; 1.
PF01336; tRNA_anti; 1.
Pfam graphical view of domain structure.
SMART SM00306; HintN; 1.
SM00481; POLIIIAc; 1.
SMART graphical view of domain structure.
TIGRFAMs TIGR01443; intein_Cterm; 1.
TIGR01445; intein_Nterm; 1.
TIGR00594; polc; 1.
PROSITE PS50818; INTEIN_C_TER; 1.
PS50817; INTEIN_N_TER; 1.
PROSITE graphical view of domain structure (profiles).
BLOCKS P74750.
Genome annotation databases
GeneID 951978; -.
953863; -.
GenomeReviews BA000022_GR; sll1572.
BA000022_GR; slr0603.
KEGG syn:sll1572; -.
syn:slr0603; -.
Phylogenomic databases
HOGENOM P74750; -.
Genome annotation databases
CMR P74750; slr0603.
Other
ProtoNet P74750.
UniRef View cluster of proteins with at least 50% / 90% / 100% identity.
Keywords
3D-structure; Autocatalytic cleavage; Complete proteome; Cytoplasm; DNA replication; DNA-directed DNA polymerase; Nucleotidyltransferase; Protein splicing; Transferase.
Features
SEVIEWER logo Feature table viewer FT aligner logo Feature aligner
KeyFrom   To Length Description FTId
CHAIN   1    774  774     DNA polymerase III subunit alpha, 1st part. PRO_0000007364
CHAIN   775    897  123     Ssp dnaE intein, 1st part. PRO_0000007365
CHAIN   898    933  36     Ssp dnaE intein, 2nd part. PRO_0000007366
CHAIN   934   1355  422     DNA polymerase III subunit alpha, 2nd part. PRO_0000007367
NON_CONS   897    898         
STRAND   781    784  4      
TURN   785    787  3      
STRAND   788    791  4      
HELIX   792    797  6      
STRAND   803    807  5      
STRAND   811    817  7      
STRAND   820    834  15      
STRAND   839    842  4      
STRAND   847    850  4      
STRAND   855    857  3      
HELIX   858    863  6      
STRAND   867    872  6      
HELIX   874    882  9      
STRAND   886    889  4      
HELIX   890    893  4      
STRAND   896    916  21      
STRAND   918    925  8      
STRAND   928    932  5      
Sequence information
Length: 1355 AA [This is the length of the partial sequence of the unprocessed precursor] Molecular weight: 153001 Da [This is the MW of the partial sequence of the unprocessed precursor] CRC64: 7C4F61EE4C36EE0F [This is a checksum on the sequence]
        10         20         30         40         50         60 
MSFVGLHIHS DYSLLDGASQ LPALIDRAIE LGMPAIALTD HGVMYGAVEL LKVCRGKPIK 

        70         80         90        100        110        120 
PIIGNEMYVI NGDIEINKRH RRFHQVVLAK NNQGYRNLVK LTTISNLKGI QGSGIFARPC 

       130        140        150        160        170        180 
INKELLEQYK EGLIVTSACL GGEVPQAILK GDLDHARQVA KWYKNLFGDD YYLEIQDHGS 

       190        200        210        220        230        240 
VEDRLVNINL VKIAQELDIK IVATNDSHFI SCNDVEAHDA LLCIQTGKLI TEEKRLRYSG 

       250        260        270        280        290        300 
TEYLKSAEEM HLLFRDHLPD DIIETAIANT LEVADKVEAY SILGEPRIPH YPIPPNHTPE 

       310        320        330        340        350        360 
TYVEDIAWDG LLERLKCRER ADITPVYKER LEYELRMLEK MGFCTYFLVV WDYIKYARDH 

       370        380        390        400        410        420 
GIPVGPGRGS AAGSLVAYCM KITNIDPVHH GLIFERFLNP ERKSMPDVDT DFCIDRRDEM 

       430        440        450        460        470        480 
IEYVTQKYGE DKVAQIITFN RMTSKAVLKD VARVLDIPYA ESDKMAKMIP VSRGKPAKLK 

       490        500        510        520        530        540 
VMISDQTPEP QFKARYDNEP WVKKWIDMAI RIEGTNKTFG VHAAGVVISS EPLDQIVPLQ 

       550        560        570        580        590        600 
KNNDGAVITQ YYMEDVEAMG LLKMDFLGLK NLTTLQRAVE LVAETKGIEL DLDDLPLQER 

       610        620        630        640        650        660 
KALQIRARTG SKKLPDDVKK THKLLEAGDL EGIFQLESQG MKQIVRDLKP SGIEDISSIL 

       670        680        690        700        710        720 
ALYRPGPLDA GLIPIFINRK HGREEISYQH KLLEPILNET YGVLVYQEQI MKMAQDLADY 

       730        740        750        760        770        780 
SLGEADLLRR AMGKKKAEEM QKHRAKFVDG STKHGVPSRI AENLFDQMVK FAEYCLSFGT 

       790        800        810        820        830        840 
EILTVEYGPL PIGKIVSEEI NCSVYSVDPE GRVYTQAIAQ WHDRGEQEVL EYELEDGSVI 

       850        860        870        880        890        900 
RATSDHRFLT TDYQLLAIEE IFARQLDLLT LENIKQTEEA LDNHRLPFPL LDAGTIKMVK 

       910        920        930        940        950        960 
VIGRRSLGVQ RIFDIGLPQD HNFLLANGAI AANCFNKSHS TAYAYVTYQT AYLKANYPVE 

       970        980        990       1000       1010       1020 
YMAALLTASS DSQEKVEKYR ENCQKMGITV EPPDINRSQR HFTPLGEAIL FGLSAVRNLG 

      1030       1040       1050       1060       1070       1080 
EGAIEQIITA RDNSEEKRFK SLADFCTQVD LRVVNRRAIE TLIMAGAFDG VQSNRNQLLH 

      1090       1100       1110       1120       1130       1140 
DLELVIAWAQ KRAKEKETGQ LNIFDSLTAG ESIKAKEAAN NGFEQEPSAP PVAEFSLQEK 

      1150       1160       1170       1180       1190       1200 
LQLEKEHLGF YVSEHPLKSV QRSARLLSPI NLVDLDQYKV RQKVSAVAIL VAVKKIITKK 

      1210       1220       1230       1240       1250       1260 
NGQPMAFLTL EDMSGQSEAV VFPSNYERLQ DVLIEGSQQM IWGKVDRRDD QYQLIVEDLE 

      1270       1280       1290       1300       1310       1320 
PVEEVKMVML DLTPQEIANT STQARLKQIL QSHAPQKEQM KIPVVACINE GPTKHFIRFG 

      1330       1340       1350 
ENYWVNDYGT AVASLQELGF RARLEPLLPQ SQSVG 

P74750 in FASTA format

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