Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5630
Number of amino acids:493
Molecular Weight:55686.94 Da
Theoretical pI:8.26


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)387.71%
Cysteine CYS (C)61.22%
Glutamic Acid GLU (E)316.29%
Aspartic Acid ASP (D)163.25%
Glycine GLY (G)357.1%
Phynylalanine PHE (F)255.07%
Isoleucine ILE (I)244.87%
Histidine HIS (H)81.62%
Lysine LYS (K)102.03%
Methionine MET (M)30.61%
Leucine LEU (L)377.51%
Asparagine ASN (N)346.9%
Glutamine GLN (Q)6914%
Proline PRO (P)224.46%
Serine SER (S)316.29%
Arginine ARG (R)397.91%
Threonine THR (T)234.67%
Tryptophan TRP (W)81.62%
Valine VAL (V)295.88%
Tyrosine TYR (Y)51.01%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2423
HydrogenH3803
NitrogenN747
OxygenO750
SulphurS9

FormulaC2423H3803N747O750S9
Total Number of Atoms:7732


Total number of positively charged residues (ARG + LYS):49
Total number of negatively charged residues (ASP + GLU):47
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    51825
Absorption 0.1% (=1 g/l)    0.931,   assuming all pairs of CYS residues form cystines

Ext. coefficient    51450
Absorption 0.1% (=1 g/l)    0.924,   assuming all CYS residues are reduced
Aromaticity:0.077

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 56.63

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.96, 24.75, 22.11]

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:73.0223
Grand average of hydropathicity (GRAVY):-0.69