Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4608
Number of amino acids:345
Molecular Weight:38248.39 Da
Theoretical pI:8.63


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)267.54%
Cysteine CYS (C)92.61%
Glutamic Acid GLU (E)133.77%
Aspartic Acid ASP (D)154.35%
Glycine GLY (G)298.41%
Phynylalanine PHE (F)164.64%
Isoleucine ILE (I)226.38%
Histidine HIS (H)30.87%
Lysine LYS (K)185.22%
Methionine MET (M)102.9%
Leucine LEU (L)185.22%
Asparagine ASN (N)257.25%
Glutamine GLN (Q)144.06%
Proline PRO (P)133.77%
Serine SER (S)339.57%
Arginine ARG (R)154.35%
Threonine THR (T)154.35%
Tryptophan TRP (W)82.32%
Valine VAL (V)267.54%
Tyrosine TYR (Y)174.93%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1703
HydrogenH2611
NitrogenN461
OxygenO506
SulphurS19

FormulaC1703H2611N461O506S19
Total Number of Atoms:5300


Total number of positively charged residues (ARG + LYS):33
Total number of negatively charged residues (ASP + GLU):28
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    69830
Absorption 0.1% (=1 g/l)    1.826,   assuming all pairs of CYS residues form cystines

Ext. coefficient    69330
Absorption 0.1% (=1 g/l)    1.813,   assuming all CYS residues are reduced
Aromaticity:0.119

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.21

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.01, 28.99, 19.42]

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:74.6087
Grand average of hydropathicity (GRAVY):-0.20