Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4417
Number of amino acids:626
Molecular Weight:68060.4 Da
Theoretical pI:8.5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)457.19%
Cysteine CYS (C)81.28%
Glutamic Acid GLU (E)294.63%
Aspartic Acid ASP (D)325.11%
Glycine GLY (G)6410.22%
Phynylalanine PHE (F)457.19%
Isoleucine ILE (I)223.51%
Histidine HIS (H)101.6%
Lysine LYS (K)447.03%
Methionine MET (M)71.12%
Leucine LEU (L)294.63%
Asparagine ASN (N)548.63%
Glutamine GLN (Q)101.6%
Proline PRO (P)243.83%
Serine SER (S)6510.38%
Arginine ARG (R)223.51%
Threonine THR (T)426.71%
Tryptophan TRP (W)50.8%
Valine VAL (V)426.71%
Tyrosine TYR (Y)274.31%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3019
HydrogenH4575
NitrogenN825
OxygenO947
SulphurS15

FormulaC3019H4575N825O947S15
Total Number of Atoms:9381


Total number of positively charged residues (ARG + LYS):66
Total number of negatively charged residues (ASP + GLU):61
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    68230
Absorption 0.1% (=1 g/l)    1.002,   assuming all pairs of CYS residues form cystines

Ext. coefficient    67730
Absorption 0.1% (=1 g/l)    0.995,   assuming all CYS residues are reduced
Aromaticity:0.123

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.59

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.16, 33.07, 17.57]

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:58.4186
Grand average of hydropathicity (GRAVY):-0.48