Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4731
Number of amino acids:847
Molecular Weight:93658.66 Da
Theoretical pI:8.8


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)617.2%
Cysteine CYS (C)202.36%
Glutamic Acid GLU (E)364.25%
Aspartic Acid ASP (D)323.78%
Glycine GLY (G)8710.27%
Phynylalanine PHE (F)364.25%
Isoleucine ILE (I)333.9%
Histidine HIS (H)212.48%
Lysine LYS (K)495.79%
Methionine MET (M)232.72%
Leucine LEU (L)627.32%
Asparagine ASN (N)435.08%
Glutamine GLN (Q)273.19%
Proline PRO (P)526.14%
Serine SER (S)667.79%
Arginine ARG (R)333.9%
Threonine THR (T)414.84%
Tryptophan TRP (W)252.95%
Valine VAL (V)586.85%
Tyrosine TYR (Y)424.96%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4224
HydrogenH6392
NitrogenN1132
OxygenO1203
SulphurS43

FormulaC4224H6392N1132O1203S43
Total Number of Atoms:12994


Total number of positively charged residues (ARG + LYS):82
Total number of negatively charged residues (ASP + GLU):68
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    201330
Absorption 0.1% (=1 g/l)    2.150,   assuming all pairs of CYS residues form cystines

Ext. coefficient    200080
Absorption 0.1% (=1 g/l)    2.136,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.46

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.22, 29.28, 21.49]

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:70.8028
Grand average of hydropathicity (GRAVY):-0.28