Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4426
Number of amino acids:623
Molecular Weight:68896.15 Da
Theoretical pI:5.51


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)436.9%
Cysteine CYS (C)355.62%
Glutamic Acid GLU (E)375.94%
Aspartic Acid ASP (D)477.54%
Glycine GLY (G)538.51%
Phynylalanine PHE (F)233.69%
Isoleucine ILE (I)335.3%
Histidine HIS (H)101.61%
Lysine LYS (K)528.35%
Methionine MET (M)121.93%
Leucine LEU (L)406.42%
Asparagine ASN (N)325.14%
Glutamine GLN (Q)223.53%
Proline PRO (P)233.69%
Serine SER (S)396.26%
Arginine ARG (R)203.21%
Threonine THR (T)314.98%
Tryptophan TRP (W)132.09%
Valine VAL (V)396.26%
Tyrosine TYR (Y)193.05%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3013
HydrogenH4690
NitrogenN822
OxygenO935
SulphurS47

FormulaC3013H4690N822O935S47
Total Number of Atoms:9507


Total number of positively charged residues (ARG + LYS):72
Total number of negatively charged residues (ASP + GLU):84
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    101935
Absorption 0.1% (=1 g/l)    1.480,   assuming all pairs of CYS residues form cystines

Ext. coefficient    99810
Absorption 0.1% (=1 g/l)    1.449,   assuming all CYS residues are reduced
Aromaticity:0.088

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.81, 23.60, 21.19]

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:70.7544
Grand average of hydropathicity (GRAVY):-0.38