Protein isoelectric point calculator


Datasets used for isoelectric point optimization



Dataset

Initial no. entries

No. entries with
sequence and pI

No. entries after
removing outliers

No. entries after
removing duplicates

Gauci et al.

5,758

  5,758

NA

NA

PHENYX

7,582

  7,582

NA

NA

SEQUEST

7,629

  7,629

NA

NA

IPC_peptide

-

20,969

20,969

16,882   [25]    [75]_

SWISS-2DPAGE

2,530

  1,054

     1,029  

     982_

PIP-DB

4,947

  2,427

    2,254  

1,307

IPC_protein

-

3.481

   3,283

2,324    [25]    [75]_


Note:


Precalculated isoelectric points for PDB and Swiss-prot databases and few proteomes

(first two files are compressed using 7z to save disc space)

PDB
(339k proteins)
Swiss-Prot
(550k proteins)


Homo sapiens
(99739 proteins)
Escherichia coli
(4128 proteins)
Natrialba magadii
(3559 proteins)


Contact: Lukasz P. Kozlowski