Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4721
Number of amino acids:499
Molecular Weight:54426.71 Da
Theoretical pI:8.76


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)6212.42%
Cysteine CYS (C)71.4%
Glutamic Acid GLU (E)122.4%
Aspartic Acid ASP (D)295.81%
Glycine GLY (G)418.22%
Phynylalanine PHE (F)183.61%
Isoleucine ILE (I)102%
Histidine HIS (H)183.61%
Lysine LYS (K)193.81%
Methionine MET (M)122.4%
Leucine LEU (L)489.62%
Asparagine ASN (N)132.61%
Glutamine GLN (Q)193.81%
Proline PRO (P)285.61%
Serine SER (S)408.02%
Arginine ARG (R)285.61%
Threonine THR (T)255.01%
Tryptophan TRP (W)71.4%
Valine VAL (V)357.01%
Tyrosine TYR (Y)285.61%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2436
HydrogenH3735
NitrogenN677
OxygenO707
SulphurS19

FormulaC2436H3735N677O707S19
Total Number of Atoms:7574


Total number of positively charged residues (ARG + LYS):47
Total number of negatively charged residues (ASP + GLU):41
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    80595
Absorption 0.1% (=1 g/l)    1.481,   assuming all pairs of CYS residues form cystines

Ext. coefficient    80220
Absorption 0.1% (=1 g/l)    1.474,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.90

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.26, 24.45, 26.85]

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:78.0962
Grand average of hydropathicity (GRAVY):-0.18