Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5994
Number of amino acids:327
Molecular Weight:37122.29 Da
Theoretical pI:7.77


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)123.67%
Cysteine CYS (C)72.14%
Glutamic Acid GLU (E)30.92%
Aspartic Acid ASP (D)30.92%
Glycine GLY (G)103.06%
Phynylalanine PHE (F)154.59%
Isoleucine ILE (I)216.42%
Histidine HIS (H)41.22%
Lysine LYS (K)30.92%
Methionine MET (M)61.83%
Leucine LEU (L)267.95%
Asparagine ASN (N)41.22%
Glutamine GLN (Q)10933.33%
Proline PRO (P)5416.51%
Serine SER (S)185.5%
Arginine ARG (R)41.22%
Threonine THR (T)103.06%
Tryptophan TRP (W)30.92%
Valine VAL (V)144.28%
Tyrosine TYR (Y)10.31%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1654
HydrogenH2580
NitrogenN466
OxygenO482
SulphurS13

FormulaC1654H2580N466O482S13
Total Number of Atoms:5195


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    18365
Absorption 0.1% (=1 g/l)    0.495,   assuming all pairs of CYS residues form cystines

Ext. coefficient    17990
Absorption 0.1% (=1 g/l)    0.485,   assuming all CYS residues are reduced
Aromaticity:0.058

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 114.05

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.46, 26.30, 14.37]

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:72.1407
Grand average of hydropathicity (GRAVY):-0.70