Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2711
Number of amino acids:38
Molecular Weight:4310.88 Da
Theoretical pI:4.31


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)25.26%
Cysteine CYS (C)12.63%
Glutamic Acid GLU (E)25.26%
Aspartic Acid ASP (D)25.26%
Glycine GLY (G)12.63%
Phynylalanine PHE (F)25.26%
Isoleucine ILE (I)25.26%
Histidine HIS (H)12.63%
Lysine LYS (K)00%
Methionine MET (M)25.26%
Leucine LEU (L)410.53%
Asparagine ASN (N)25.26%
Glutamine GLN (Q)513.16%
Proline PRO (P)25.26%
Serine SER (S)410.53%
Arginine ARG (R)12.63%
Threonine THR (T)12.63%
Tryptophan TRP (W)00%
Valine VAL (V)37.89%
Tyrosine TYR (Y)12.63%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC188
HydrogenH294
NitrogenN50
OxygenO60
SulphurS3

FormulaC188H294N50O60S3
Total Number of Atoms:595


Total number of positively charged residues (ARG + LYS):1
Total number of negatively charged residues (ASP + GLU):4
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    1490
Absorption 0.1% (=1 g/l)    0.346,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.346,   assuming all CYS residues are reduced
Aromaticity:0.079

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 81.17

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.58, 23.68, 26.32]

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:89.7368
Grand average of hydropathicity (GRAVY):-0.07