Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5481
Number of amino acids:349
Molecular Weight:25028.18 Da
Theoretical pI:9.2


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)339.46%
Cysteine CYS (C)10.29%
Glutamic Acid GLU (E)30.86%
Aspartic Acid ASP (D)00%
Glycine GLY (G)24570.2%
Phynylalanine PHE (F)164.58%
Isoleucine ILE (I)92.58%
Histidine HIS (H)61.72%
Lysine LYS (K)30.86%
Methionine MET (M)20.57%
Leucine LEU (L)154.3%
Asparagine ASN (N)00%
Glutamine GLN (Q)00%
Proline PRO (P)00%
Serine SER (S)41.15%
Arginine ARG (R)20.57%
Threonine THR (T)20.57%
Tryptophan TRP (W)00%
Valine VAL (V)82.29%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1031
HydrogenH1562
NitrogenN370
OxygenO362
SulphurS3

FormulaC1031H1562N370O362S3
Total Number of Atoms:3328


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.046

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 57.05

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[13.75, 71.35, 15.19]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:42.9226
Grand average of hydropathicity (GRAVY):0.25