| First Author | Kubota H | Year | 1995 |
| Journal | Gene | Volume | 154 |
| Issue | 2 | Pages | 231-6 |
| PubMed ID | 7890169 | Mgi Jnum | J:23969 |
| Mgi Id | MGI:71763 | Doi | 10.1016/0378-1119(94)00880-2 |
| Citation | Kubota H, et al. (1995) The eighth Cct gene, Cctq, encoding the theta subunit of the cytosolic chaperonin containing TCP-1. Gene 154(2):231-6 |
| abstractText | The chaperonin containing t-complex polypeptide 1 (TCP-1), as one of its subunits, CCT, is a cytosolic heterooligomeric molecular chaperone assisting in the folding of proteins in eukaryotic cytosol. We have isolated a Tcp-1-related 119-bp cDNA fragment from a human cDNA library by polymerase chain reaction, and cloned full-length mouse cDNAs orthologous to the human cDNA by hybridization. The nucleotide (nt) sequence of the longest mouse clone (1844 bp) shows an open reading frame (ORF) encoding a TCP-1-related polypeptide of 548 amino acids (aa) (59,562 Da). This gene is different from Tcp-1 and the six Tcp-1-related genes reported previously, Tcp-1 (Ccta), Cctb, Cctg, Cctd, Ccte, Cctz and Ccth, which encode subunits of CCT. The product of the novel gene was analysed using an antibody raised against the C terminus of the polypeptide deduced from the nt sequence. We found that this gene encodes a subunit of CCT (polypeptide S1; 62 kDa and pI 6.25 by two-dimensional gel analysis). We have named it Cctq, encoding the theta subunit of CCT (CCT theta). The aa sequence of CCT theta shows 23-29% identity to the other CCT subunits, alpha, beta, gamma, delta, epsilon, zeta and eta, and 29% identity to the archaebacterial chaperonin TF55. CCT theta also contains the motifs common to all the other subunits of CCT which are postulated to be involved in ATPase activity. |
