Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2383
Number of amino acids:41
Molecular Weight:4533.31 Da
Theoretical pI:4.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)24.88%
Cysteine CYS (C)819.51%
Glutamic Acid GLU (E)24.88%
Aspartic Acid ASP (D)24.88%
Glycine GLY (G)49.76%
Phynylalanine PHE (F)12.44%
Isoleucine ILE (I)24.88%
Histidine HIS (H)12.44%
Lysine LYS (K)12.44%
Methionine MET (M)37.32%
Leucine LEU (L)24.88%
Asparagine ASN (N)24.88%
Glutamine GLN (Q)24.88%
Proline PRO (P)24.88%
Serine SER (S)12.44%
Arginine ARG (R)12.44%
Threonine THR (T)24.88%
Tryptophan TRP (W)12.44%
Valine VAL (V)12.44%
Tyrosine TYR (Y)12.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC186
HydrogenH288
NitrogenN52
OxygenO58
SulphurS11

FormulaC186H288N52O58S11
Total Number of Atoms:595


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):4
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7490
Absorption 0.1% (=1 g/l)    1.652,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    1.542,   assuming all CYS residues are reduced
Aromaticity:0.073

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.19

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[19.51, 21.95, 21.95]

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:50
Grand average of hydropathicity (GRAVY):0.10