TABLE 2.
N-terminal sequences of fungal and E. coli phytases
| Source of phytase | Sequenceb | Position of first residue |
|---|---|---|
| A. niger (Natuphos) | XQSSXDTVDQGYQXF | 27 (19)c |
| A. niger CB | XQSTXDTV | 27 (19) |
| SRXQSTX | 25 | |
| ASRXQST | 24 | |
| A. terreus 9A1 | SDXNSVDHGY | 29 (19) |
| A. terreus CBSa | TALGPXGX | 20 (19) |
| GXHSDXTSVD | 26 | |
| A. fumigatus | SKSXDTVDLGY | 27 (21) |
| E. nidulans | VVQNHSX | 23 (20) |
| NHSXNTA | 26 | |
| M. thermophila | SESRP | 21 (18) |
| T. thermophilusa | TALGPRGXHSK(S)XDTAX(G)(G)XQ | 20 (19) |
| E. coli | QSE(P)ELKL(E) | 23 (23) |
a
These proteins were expressed in H. polymorpha; all of the other fungal phytases were expressed in A. niger.
b
Some of the Xs represent Asn residues that were probably glycosylated.
c
The number in parentheses indicates the first residue of the mature protein predicted by using the von Heijne rules.