Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5406
Number of amino acids:648
Molecular Weight:69628.78 Da
Theoretical pI:7.79


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)294.48%
Cysteine CYS (C)71.08%
Glutamic Acid GLU (E)172.62%
Aspartic Acid ASP (D)40.62%
Glycine GLY (G)11317.44%
Phynylalanine PHE (F)30.46%
Isoleucine ILE (I)50.77%
Histidine HIS (H)132.01%
Lysine LYS (K)81.23%
Methionine MET (M)40.62%
Leucine LEU (L)284.32%
Asparagine ASN (N)00%
Glutamine GLN (Q)20631.79%
Proline PRO (P)6910.65%
Serine SER (S)426.48%
Arginine ARG (R)142.16%
Threonine THR (T)264.01%
Tryptophan TRP (W)60.93%
Valine VAL (V)203.09%
Tyrosine TYR (Y)345.25%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2967
HydrogenH4510
NitrogenN936
OxygenO999
SulphurS11

FormulaC2967H4510N936O999S11
Total Number of Atoms:9423


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):21
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    84035
Absorption 0.1% (=1 g/l)    1.207,   assuming all pairs of CYS residues form cystines

Ext. coefficient    83660
Absorption 0.1% (=1 g/l)    1.202,   assuming all CYS residues are reduced
Aromaticity:0.066

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 82.90

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.81, 34.57, 12.04]

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:33.287
Grand average of hydropathicity (GRAVY):-1.37