Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4405
Number of amino acids:351
Molecular Weight:39261.56 Da
Theoretical pI:5.81


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)308.55%
Cysteine CYS (C)20.57%
Glutamic Acid GLU (E)205.7%
Aspartic Acid ASP (D)113.13%
Glycine GLY (G)246.84%
Phynylalanine PHE (F)174.84%
Isoleucine ILE (I)308.55%
Histidine HIS (H)51.42%
Lysine LYS (K)185.13%
Methionine MET (M)61.71%
Leucine LEU (L)339.4%
Asparagine ASN (N)3610.26%
Glutamine GLN (Q)143.99%
Proline PRO (P)164.56%
Serine SER (S)236.55%
Arginine ARG (R)92.56%
Threonine THR (T)143.99%
Tryptophan TRP (W)30.85%
Valine VAL (V)174.84%
Tyrosine TYR (Y)236.55%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1785
HydrogenH2731
NitrogenN459
OxygenO524
SulphurS8

FormulaC1785H2731N459O524S8
Total Number of Atoms:5507


Total number of positively charged residues (ARG + LYS):27
Total number of negatively charged residues (ASP + GLU):31
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    50895
Absorption 0.1% (=1 g/l)    1.296,   assuming all pairs of CYS residues form cystines

Ext. coefficient    50770
Absorption 0.1% (=1 g/l)    1.293,   assuming all CYS residues are reduced
Aromaticity:0.123

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.22

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.04, 28.21, 25.36]

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:92.5926
Grand average of hydropathicity (GRAVY):-0.16