Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5460
Number of amino acids:276
Molecular Weight:30490.93 Da
Theoretical pI:7.02


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)165.8%
Cysteine CYS (C)93.26%
Glutamic Acid GLU (E)82.9%
Aspartic Acid ASP (D)145.07%
Glycine GLY (G)3211.59%
Phynylalanine PHE (F)145.07%
Isoleucine ILE (I)155.43%
Histidine HIS (H)41.45%
Lysine LYS (K)165.8%
Methionine MET (M)124.35%
Leucine LEU (L)176.16%
Asparagine ASN (N)165.8%
Glutamine GLN (Q)134.71%
Proline PRO (P)134.71%
Serine SER (S)113.99%
Arginine ARG (R)62.17%
Threonine THR (T)227.97%
Tryptophan TRP (W)72.54%
Valine VAL (V)186.52%
Tyrosine TYR (Y)134.71%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1368
HydrogenH2076
NitrogenN354
OxygenO396
SulphurS21

FormulaC1368H2076N354O396S21
Total Number of Atoms:4215


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):22
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    58370
Absorption 0.1% (=1 g/l)    1.914,   assuming all pairs of CYS residues form cystines

Ext. coefficient    57870
Absorption 0.1% (=1 g/l)    1.898,   assuming all CYS residues are reduced
Aromaticity:0.123

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 22.12

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.43, 26.09, 19.20]

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:69.9275
Grand average of hydropathicity (GRAVY):-0.15