Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1540
Number of amino acids:24
Molecular Weight:2552.85 Da
Theoretical pI:9.7


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)520.83%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)416.67%
Phynylalanine PHE (F)28.33%
Isoleucine ILE (I)14.17%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)14.17%
Leucine LEU (L)00%
Asparagine ASN (N)28.33%
Glutamine GLN (Q)00%
Proline PRO (P)28.33%
Serine SER (S)14.17%
Arginine ARG (R)28.33%
Threonine THR (T)14.17%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)312.5%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC116
HydrogenH166
NitrogenN32
OxygenO32
SulphurS1

FormulaC116H166N32O32S1
Total Number of Atoms:347


Total number of positively charged residues (ARG + LYS):2
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    4470
Absorption 0.1% (=1 g/l)    1.751
Aromaticity:0.208

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.08

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.00, 37.50, 25.00]

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:37.0833
Grand average of hydropathicity (GRAVY):-0.22