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HolD |
Protein FULL name:
DNA polymerase III psi subunit [Escherichia coli].
HolD (Escherichia coli strain K-12 substr. MG1655) is product of expression of holD gene.
HolD is involved in:
MMR in Escherichia coli strain K-12 substr. MG1655
Keywords:
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 exact function of the psi subunit is unknown.
CATALYTIC ACTIVITY: Deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1).
SUBUNIT: The DNA polymerase holoenzyme is a complex that contains 10 different types of subunits. These subunits are organized into 3 functionally essential subassemblies: the pol III core, the beta sliding clamp processivity factor and the clamp-loading complex. The pol III core (subunits alpha,epsilon and theta) contains the polymerase and the 3'-5' exonuclease proofreading activities. The polymerase is tethered to the template via the sliding clamp processivity factor. The clamp-loading complex assembles the beta processivity factor onto the primer template and plays a central role in the organization and communication at the replication fork. This complex contains delta, delta', psi and chi, and copies of either or both of two different dnaX proteins, gamma and tau. The composition of the holoenzyme is, therefore: (alpha,epsilon,theta)[2]-(gamma/tau)[3]-delta,delta', psi,chi- beta[4].
This protein can be a part of a given complexes:
| NCBI GenPept GI number(s): |
147387 |
| Species: | Escherichia coli |
Links to other databases:
| Database | ID | Link |
| Uniprot | P28632 |
P28632 |
| PFAM: | - |
P28632 (Link - using uniprot id) |
| InterPro: | - |
P28632 (Link - using uniprot id) |
| CATH: | - | - |
| SCOP: | - | - |
| PDB: | - | - |
Protein sequence:
|
MTSRRDWQLQQLGITQWSLRRPGALQGEIAIAIPAHVRLVMVANDLPALT DPLVSDVLRALTVSPDQVLQLTPEKIAMLPQGSHCNSWRLGTDEPLSLEG AQVASPALTDLRANPTARAALWQQICTYEHDFFPRND |
References:
| Title | Authors | Journal |
| Cloning and nucleotide sequencing of the genes rimI and rimJ which encode enzymes acetylating ribosomal proteins S18 and S5 of Escherichia coli K12. | Yoshikawa A, Isono S, Sheback A, Isono K | Mol Gen Genet Oct. 1, 1987 |
| Accessory protein function in the DNA polymerase III holoenzyme from E. coli. | O'Donnell M | Bioessays Jan. 1, 1992 |
| DNA polymerase III accessory proteins. III. holC and holD encoding chi and psi. | Xiao H, Crombie R, Dong Z, Onrust R, O'Donnell M | J Biol Chem June 5, 1993 |
| DNA polymerase III accessory proteins. IV. Characterization of chi and psi. | Xiao H, Dong Z, O'Donnell M | J Biol Chem June 5, 1993 |
| Identification, isolation, and overexpression of the gene encoding the psi subunit of DNA polymerase III holoenzyme. | Carter JR, Franden MA, Aebersold R, McHenry CS | J Bacteriol Sept. 1, 1993 |
| Analysis of the Escherichia coli genome VI: DNA sequence of the region from 92.8 through 100 minutes. | Burland V, Plunkett G 3rd, Sofia HJ, Daniels DL, Blattner FR | Nucleic Acids Res June 25, 1995 |
| The complete genome sequence of Escherichia coli K-12. | Blattner FR, Plunkett G 3rd, Bloch CA, Perna NT, Burland V, Riley M, Collado-Vides J, Glasner JD, Rode CK, Mayhew GF, Gregor J, Davis NW, Kirkpatrick HA, Goeden MA, Rose DJ, Mau B, Shao Y | Science Sept. 5, 1997 |
| Crystal structure of the chi:psi sub-assembly of the Escherichia coli DNA polymerase clamp-loader complex. | Gulbis JM, Kazmirski SL, Finkelstein J, Kelman Z, O'Donnell M, Kuriyan J | Eur J Biochem Feb. 1, 2004 |
| Highly accurate genome sequences of Escherichia coli K-12 strains MG1655 and W3110. | Hayashi K, Morooka N, Yamamoto Y, Fujita K, Isono K, Choi S, Ohtsubo E, Baba T, Wanner BL, Mori H, Horiuchi T | Mol Syst Biol Jan. 1, 2006 |
Last modification of this entry: Oct. 12, 2010.
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