Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5164
Number of amino acids:371
Molecular Weight:40358.26 Da
Theoretical pI:5.86


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)4311.59%
Cysteine CYS (C)82.16%
Glutamic Acid GLU (E)236.2%
Aspartic Acid ASP (D)236.2%
Glycine GLY (G)359.43%
Phynylalanine PHE (F)123.23%
Isoleucine ILE (I)102.7%
Histidine HIS (H)123.23%
Lysine LYS (K)174.58%
Methionine MET (M)92.43%
Leucine LEU (L)236.2%
Asparagine ASN (N)154.04%
Glutamine GLN (Q)112.96%
Proline PRO (P)164.31%
Serine SER (S)277.28%
Arginine ARG (R)215.66%
Threonine THR (T)133.5%
Tryptophan TRP (W)82.16%
Valine VAL (V)338.89%
Tyrosine TYR (Y)123.23%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1770
HydrogenH2731
NitrogenN509
OxygenO542
SulphurS17

FormulaC1770H2731N509O542S17
Total Number of Atoms:5569


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):46
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    62380
Absorption 0.1% (=1 g/l)    1.546,   assuming all pairs of CYS residues form cystines

Ext. coefficient    61880
Absorption 0.1% (=1 g/l)    1.533,   assuming all CYS residues are reduced
Aromaticity:0.086

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.69

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.42, 25.07, 26.42]

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:72.0755
Grand average of hydropathicity (GRAVY):-0.34