Physicochemical Properties of Peptide



PPepDB ID:PPepDB_601
Number of amino acids:25
Molecular Weight:2728.11 Da
Theoretical pI:4.56


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)312%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)14%
Aspartic Acid ASP (D)28%
Glycine GLY (G)28%
Phynylalanine PHE (F)28%
Isoleucine ILE (I)14%
Histidine HIS (H)00%
Lysine LYS (K)28%
Methionine MET (M)14%
Leucine LEU (L)312%
Asparagine ASN (N)14%
Glutamine GLN (Q)14%
Proline PRO (P)28%
Serine SER (S)14%
Arginine ARG (R)00%
Threonine THR (T)28%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)14%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC124
HydrogenH191
NitrogenN29
OxygenO38
SulphurS1

FormulaC124H191N29O38S1
Total Number of Atoms:383


Total number of positively charged residues (ARG + LYS):2
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    1490
Absorption 0.1% (=1 g/l)    0.546
Aromaticity:0.120

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.36

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.00, 24.00, 32.00]

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:74.4
Grand average of hydropathicity (GRAVY):-0.16