Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5351
Number of amino acids:499
Molecular Weight:56246.96 Da
Theoretical pI:9.1


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)346.81%
Cysteine CYS (C)102%
Glutamic Acid GLU (E)275.41%
Aspartic Acid ASP (D)153.01%
Glycine GLY (G)357.01%
Phynylalanine PHE (F)234.61%
Isoleucine ILE (I)234.61%
Histidine HIS (H)91.8%
Lysine LYS (K)122.4%
Methionine MET (M)30.6%
Leucine LEU (L)397.82%
Asparagine ASN (N)346.81%
Glutamine GLN (Q)5410.82%
Proline PRO (P)214.21%
Serine SER (S)418.22%
Arginine ARG (R)408.02%
Threonine THR (T)204.01%
Tryptophan TRP (W)30.6%
Valine VAL (V)377.41%
Tyrosine TYR (Y)193.81%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2460
HydrogenH3856
NitrogenN740
OxygenO752
SulphurS13

FormulaC2460H3856N740O752S13
Total Number of Atoms:7821


Total number of positively charged residues (ARG + LYS):52
Total number of negatively charged residues (ASP + GLU):42
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    45435
Absorption 0.1% (=1 g/l)    0.808,   assuming all pairs of CYS residues form cystines

Ext. coefficient    44810
Absorption 0.1% (=1 g/l)    0.797,   assuming all CYS residues are reduced
Aromaticity:0.090

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 51.19

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.86, 26.25, 20.64]

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:76.7736
Grand average of hydropathicity (GRAVY):-0.54