Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5446
Number of amino acids:528
Molecular Weight:57961.43 Da
Theoretical pI:6.19


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)244.55%
Cysteine CYS (C)163.03%
Glutamic Acid GLU (E)264.92%
Aspartic Acid ASP (D)224.17%
Glycine GLY (G)377.01%
Phynylalanine PHE (F)264.92%
Isoleucine ILE (I)254.73%
Histidine HIS (H)91.7%
Lysine LYS (K)254.73%
Methionine MET (M)112.08%
Leucine LEU (L)5310.04%
Asparagine ASN (N)254.73%
Glutamine GLN (Q)213.98%
Proline PRO (P)305.68%
Serine SER (S)8215.53%
Arginine ARG (R)193.6%
Threonine THR (T)264.92%
Tryptophan TRP (W)61.14%
Valine VAL (V)254.73%
Tyrosine TYR (Y)203.79%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2563
HydrogenH3972
NitrogenN680
OxygenO799
SulphurS27

FormulaC2563H3972N680O799S27
Total Number of Atoms:8041


Total number of positively charged residues (ARG + LYS):44
Total number of negatively charged residues (ASP + GLU):48
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    63800
Absorption 0.1% (=1 g/l)    1.101,   assuming all pairs of CYS residues form cystines

Ext. coefficient    62800
Absorption 0.1% (=1 g/l)    1.083,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 54.77

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.36, 32.95, 21.59]

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:75.8902
Grand average of hydropathicity (GRAVY):-0.23