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. 1998 Aug 4;95(16):9226–9231. doi: 10.1073/pnas.95.16.9226

Figure 2.

Figure 2

Sequence analysis. (A) Sequence comparison to DnaE proteins. The Ssp DnaE extein sequences (Ssp) are aligned with corresponding DnaE sequences of E. coli (Eco), Bacillus subtilis (Bsu), and Mycobacterium tuberculosis (Mtu). Only sequences proximal to the intein sequences (Int-n and Int-c) are shown, whereas the number of omitted residues at the N- and C-termini are shown in parentheses. Symbols: − represent gaps introduced to optimize the alignment; ∗ and . mark positions of identical and similar amino acids, respectively. (B) Sequence comparison to inteins. The Ssp DnaE intein sequences (Ssp DnaE), consisting of Int-n and Int-c as indicated, are aligned with corresponding sequences of Rhodothermus marinas DnaB intein (Rma DnaB), Synechocystis sp. PCC6803 DnaB intein (Ssp DnaB), and Porphyra purpurea chloroplast DnaB intein (Ppu DnaB). In the Rma DnaB intein and the Ssp DnaB intein, only sequences relating to Int-n and Int-c are shown, whereas the number of omitted residues are shown in parentheses. Putative intein motifs (Blocks A, B, F, and G) are underlined, with several critical residues marked by ∗.