Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3907
Number of amino acids:67
Molecular Weight:7053.18 Da
Theoretical pI:8.8


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)68.96%
Cysteine CYS (C)1217.91%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)45.97%
Glycine GLY (G)811.94%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)22.99%
Histidine HIS (H)22.99%
Lysine LYS (K)68.96%
Methionine MET (M)00%
Leucine LEU (L)22.99%
Asparagine ASN (N)34.48%
Glutamine GLN (Q)22.99%
Proline PRO (P)22.99%
Serine SER (S)11.49%
Arginine ARG (R)45.97%
Threonine THR (T)710.45%
Tryptophan TRP (W)11.49%
Valine VAL (V)45.97%
Tyrosine TYR (Y)11.49%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC285
HydrogenH471
NitrogenN95
OxygenO90
SulphurS12

FormulaC285H471N95O90S12
Total Number of Atoms:953


Total number of positively charged residues (ARG + LYS):10
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    7740
Absorption 0.1% (=1 g/l)    1.097,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.991,   assuming all CYS residues are reduced
Aromaticity:0.030

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.93

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.93, 20.90, 11.94]

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:49.5522
Grand average of hydropathicity (GRAVY):-0.29