Physicochemical Properties of Peptide



PPepDB ID:PPepDB_844
Number of amino acids:78
Molecular Weight:8316.71 Da
Theoretical pI:4.94


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)67.69%
Cysteine CYS (C)67.69%
Glutamic Acid GLU (E)33.85%
Aspartic Acid ASP (D)22.56%
Glycine GLY (G)67.69%
Phynylalanine PHE (F)45.13%
Isoleucine ILE (I)56.41%
Histidine HIS (H)00%
Lysine LYS (K)22.56%
Methionine MET (M)45.13%
Leucine LEU (L)78.97%
Asparagine ASN (N)56.41%
Glutamine GLN (Q)33.85%
Proline PRO (P)56.41%
Serine SER (S)67.69%
Arginine ARG (R)22.56%
Threonine THR (T)78.97%
Tryptophan TRP (W)11.28%
Valine VAL (V)45.13%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC360
HydrogenH577
NitrogenN95
OxygenO110
SulphurS10

FormulaC360H577N95O110S10
Total Number of Atoms:1152


Total number of positively charged residues (ARG + LYS):4
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5875
Absorption 0.1% (=1 g/l)    0.706,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    0.661,   assuming all CYS residues are reduced
Aromaticity:0.064

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.67

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.92, 28.21, 25.64]

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:82.5641
Grand average of hydropathicity (GRAVY):0.35