CASP2 Target T0012

1. Protein Name

Procaricain

2. Organism Name

Carica papaya

3. Number of amino acids (approx)

107

4. Accession number

EM_PL:CPPRO

5. Sequence Database

EMBL

6. Amino acid sequence

MDFSIVGYSQ DDLTSTERLI QLFNSWMLNH NKFYENVDEK LYRFEIFKDN
LNYIDETNKK NNSYWLGLNE FADLSNDEFN EKYVGSLIDA TIEQSYDEEF
INEDTVN

7. Homologous Sequence of known structure

yes

8. Current state of the experimental work

Refinement and manuscript preparation but only 3.2A resolution

9. Interpretable map?

yes

10. Estimated date of chain tracing completion

Done

11. Estimated date of public release of structure

1.9.96 - 1.10.96

13. Name

John Jenkins

14. Mailing address

Food Macromolecular Science
Institute of Food Research
Earley Gate
Whiteknights Road
Reading RG6 6BZ, UK

15. Telephone

+44 (0)1189 357143

16. Fax

+44 (0)1189 267917

17. Email

john.jenkins@bbsrc.ac.uk

18. Source of information about experiment

Email

12. Additional Information

The structure of the 216 residue mature enzyme is already known at 1.8A resolution (PDB: 1PPO). The "new" information is the structure of the proregion (107 residues). The structure of a homologous proenzyme, cathepsin B, with a shorter proregion (62 residues) has been recently published by the group of Cygler. Note: EMBL sequence contains a signal sequence:

embl sequence:
MAMIPSISKLLFVAICLFVHMSVSFGDFSIVGYSQDDLTSTERLI
QLFNSWMLNHNKFYENVDEKLYRFEIFKDNLNYIDETNKKNNSYWLGLNEFADLSNDEF
NEKYVGSLIDATIEQSYDEEFINEDTVNLPENVDWRKKGAVTPVRHQGSCGSCWAFSAV
ATVEGINKIRTGKLVELSEQELVDCERRSHGCKGGYPPYALEYVAKNGIHLRSKYPYKA
KQGTCRAKQVGGPIVKTSGVGRVQPNNEGNLLNAIAKQPVSVVVESKGRPFQLYKGGIF
EGPCGTKVDHAVTAVGYGKSGGKGYILIKNSWGTAWGEKGYIRIKRAPGNSPGVCGLYK
SSYYPTKN

Note that the signal peptide is included in the above sequence so that the sequence expressed in E. coli was:

MDFSIVGYSQDDLTSTERLI
QLFNSWMLNHNKFYENVDEKLYRFEIFKDNLNYIDETNKKNNSYWLGLNEFADLSNDEF
NEKYVGSLIDATIEQSYDEEFINEDTVNLPENVDWRKKGAVTPVRHQGSCGSCWAFSAV
ATVEGINKIRTGKLVELSEQELVDCERRSHGCKGGYPPYALEYVAKNGIHLRSKYPYKA
KQGTCRAKQVGGPIVKTSGVGRVQPNNEGNLLNAIAKQPVSVVVESKGRPFQLYKGGIF
EGPCGTKVDHAVTAVGYGKSGGKGYILIKNSWGTAWGEKGYIRIKRAPGNSPGVCGLYK
SSYYPTKN

and the initial (new) methionine was probably removed

Related Files

Template PDB file