Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5021
Number of amino acids:1051
Molecular Weight:115147.9 Da
Theoretical pI:8.55


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)605.71%
Cysteine CYS (C)100.95%
Glutamic Acid GLU (E)706.66%
Aspartic Acid ASP (D)434.09%
Glycine GLY (G)353.33%
Phynylalanine PHE (F)424%
Isoleucine ILE (I)363.43%
Histidine HIS (H)161.52%
Lysine LYS (K)575.42%
Methionine MET (M)191.81%
Leucine LEU (L)1059.99%
Asparagine ASN (N)514.85%
Glutamine GLN (Q)333.14%
Proline PRO (P)1059.99%
Serine SER (S)17116.27%
Arginine ARG (R)625.9%
Threonine THR (T)565.33%
Tryptophan TRP (W)40.38%
Valine VAL (V)615.8%
Tyrosine TYR (Y)151.43%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC5046
HydrogenH8078
NitrogenN1414
OxygenO1604
SulphurS29

FormulaC5046H8078N1414O1604S29
Total Number of Atoms:16171


Total number of positively charged residues (ARG + LYS):119
Total number of negatively charged residues (ASP + GLU):113
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    44975
Absorption 0.1% (=1 g/l)    0.391,   assuming all pairs of CYS residues form cystines

Ext. coefficient    44350
Absorption 0.1% (=1 g/l)    0.385,   assuming all CYS residues are reduced
Aromaticity:0.058

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 75.25

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.02, 34.44, 24.17]

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:74.8621
Grand average of hydropathicity (GRAVY):-0.49