Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4107
Number of amino acids:522
Molecular Weight:57396.79 Da
Theoretical pI:6.18


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)417.85%
Cysteine CYS (C)91.72%
Glutamic Acid GLU (E)163.07%
Aspartic Acid ASP (D)315.94%
Glycine GLY (G)417.85%
Phynylalanine PHE (F)285.36%
Isoleucine ILE (I)285.36%
Histidine HIS (H)40.77%
Lysine LYS (K)254.79%
Methionine MET (M)91.72%
Leucine LEU (L)479%
Asparagine ASN (N)336.32%
Glutamine GLN (Q)305.75%
Proline PRO (P)183.45%
Serine SER (S)479%
Arginine ARG (R)203.83%
Threonine THR (T)366.9%
Tryptophan TRP (W)101.92%
Valine VAL (V)326.13%
Tyrosine TYR (Y)173.26%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2557
HydrogenH3960
NitrogenN688
OxygenO780
SulphurS18

FormulaC2557H3960N688O780S18
Total Number of Atoms:8003


Total number of positively charged residues (ARG + LYS):45
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    80830
Absorption 0.1% (=1 g/l)    1.408,   assuming all pairs of CYS residues form cystines

Ext. coefficient    80330
Absorption 0.1% (=1 g/l)    1.400,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 23.30

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.03, 26.63, 21.65]

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:81.6667
Grand average of hydropathicity (GRAVY):-0.18