Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4949
Number of amino acids:720
Molecular Weight:81160.3 Da
Theoretical pI:8.32


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)324.44%
Cysteine CYS (C)283.89%
Glutamic Acid GLU (E)466.39%
Aspartic Acid ASP (D)304.17%
Glycine GLY (G)466.39%
Phynylalanine PHE (F)334.58%
Isoleucine ILE (I)405.56%
Histidine HIS (H)182.5%
Lysine LYS (K)446.11%
Methionine MET (M)172.36%
Leucine LEU (L)7710.69%
Asparagine ASN (N)405.56%
Glutamine GLN (Q)294.03%
Proline PRO (P)304.17%
Serine SER (S)628.61%
Arginine ARG (R)395.42%
Threonine THR (T)344.72%
Tryptophan TRP (W)50.69%
Valine VAL (V)466.39%
Tyrosine TYR (Y)243.33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3590
HydrogenH5681
NitrogenN991
OxygenO1062
SulphurS45

FormulaC3590H5681N991O1062S45
Total Number of Atoms:11369


Total number of positively charged residues (ARG + LYS):83
Total number of negatively charged residues (ASP + GLU):76
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    65010
Absorption 0.1% (=1 g/l)    0.801,   assuming all pairs of CYS residues form cystines

Ext. coefficient    63260
Absorption 0.1% (=1 g/l)    0.779,   assuming all CYS residues are reduced
Aromaticity:0.086

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.23

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.25, 24.72, 23.89]

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:86.3471
Grand average of hydropathicity (GRAVY):-0.24