Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1480
Number of amino acids:38
Molecular Weight:4198.08 Da
Theoretical pI:11.62


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)37.89%
Cysteine CYS (C)410.53%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)37.89%
Phynylalanine PHE (F)12.63%
Isoleucine ILE (I)12.63%
Histidine HIS (H)00%
Lysine LYS (K)25.26%
Methionine MET (M)12.63%
Leucine LEU (L)615.79%
Asparagine ASN (N)12.63%
Glutamine GLN (Q)12.63%
Proline PRO (P)00%
Serine SER (S)615.79%
Arginine ARG (R)718.42%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)25.26%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC174
HydrogenH311
NitrogenN63
OxygenO47
SulphurS5

FormulaC174H311N63O47S5
Total Number of Atoms:600


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):0
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    250
Absorption 0.1% (=1 g/l)    0.060,   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:0.026

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 67.00

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.32, 26.32, 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:95.0001
Grand average of hydropathicity (GRAVY):0.09