Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3968
Number of amino acids:38
Molecular Weight:3935.47 Da
Theoretical pI:8.9


Amino Acid Composition:


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


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC163
HydrogenH253
NitrogenN51
OxygenO51
SulphurS6

FormulaC163H253N51O51S6
Total Number of Atoms:524


Total number of positively charged residues (ARG + LYS):4
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    4845
Absorption 0.1% (=1 g/l)    1.231,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    1.136,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.26

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[18.42, 39.47, 10.53]

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:38.6842
Grand average of hydropathicity (GRAVY):-0.23