Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2340
Number of amino acids:27
Molecular Weight:2851.18 Da
Theoretical pI:5.96


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)622.22%
Glutamic Acid GLU (E)13.7%
Aspartic Acid ASP (D)00%
Glycine GLY (G)518.52%
Phynylalanine PHE (F)13.7%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)13.7%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)27.41%
Glutamine GLN (Q)00%
Proline PRO (P)13.7%
Serine SER (S)311.11%
Arginine ARG (R)00%
Threonine THR (T)311.11%
Tryptophan TRP (W)27.41%
Valine VAL (V)13.7%
Tyrosine TYR (Y)13.7%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC118
HydrogenH168
NitrogenN32
OxygenO39
SulphurS6

FormulaC118H168N32O39S6
Total Number of Atoms:363


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

Ext. coefficient    12865
Absorption 0.1% (=1 g/l)    4.512,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12490
Absorption 0.1% (=1 g/l)    4.381,   assuming all CYS residues are reduced
Aromaticity:0.148

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[18.52, 40.74, 3.70]

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:10.7407
Grand average of hydropathicity (GRAVY):-0.13