Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5357
Number of amino acids:314
Molecular Weight:34585.29 Da
Theoretical pI:7.1


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3210.19%
Cysteine CYS (C)82.55%
Glutamic Acid GLU (E)92.87%
Aspartic Acid ASP (D)237.32%
Glycine GLY (G)196.05%
Phynylalanine PHE (F)216.69%
Isoleucine ILE (I)144.46%
Histidine HIS (H)41.27%
Lysine LYS (K)144.46%
Methionine MET (M)113.5%
Leucine LEU (L)268.28%
Asparagine ASN (N)216.69%
Glutamine GLN (Q)144.46%
Proline PRO (P)134.14%
Serine SER (S)257.96%
Arginine ARG (R)185.73%
Threonine THR (T)165.1%
Tryptophan TRP (W)10.32%
Valine VAL (V)185.73%
Tyrosine TYR (Y)72.23%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1517
HydrogenH2378
NitrogenN426
OxygenO462
SulphurS19

FormulaC1517H2378N426O462S19
Total Number of Atoms:4802


Total number of positively charged residues (ARG + LYS):32
Total number of negatively charged residues (ASP + GLU):32
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    16430
Absorption 0.1% (=1 g/l)    0.475,   assuming all pairs of CYS residues form cystines

Ext. coefficient    15930
Absorption 0.1% (=1 g/l)    0.461,   assuming all CYS residues are reduced
Aromaticity:0.092

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.13

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.71, 24.84, 24.84]

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:76.4968
Grand average of hydropathicity (GRAVY):-0.18