Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3996
Number of amino acids:507
Molecular Weight:55730.78 Da
Theoretical pI:9.01


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)367.1%
Cysteine CYS (C)203.94%
Glutamic Acid GLU (E)163.16%
Aspartic Acid ASP (D)275.33%
Glycine GLY (G)377.3%
Phynylalanine PHE (F)214.14%
Isoleucine ILE (I)326.31%
Histidine HIS (H)173.35%
Lysine LYS (K)438.48%
Methionine MET (M)122.37%
Leucine LEU (L)326.31%
Asparagine ASN (N)367.1%
Glutamine GLN (Q)183.55%
Proline PRO (P)254.93%
Serine SER (S)387.5%
Arginine ARG (R)163.16%
Threonine THR (T)326.31%
Tryptophan TRP (W)71.38%
Valine VAL (V)316.11%
Tyrosine TYR (Y)112.17%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2451
HydrogenH3865
NitrogenN693
OxygenO729
SulphurS32

FormulaC2451H3865N693O729S32
Total Number of Atoms:7770


Total number of positively charged residues (ARG + LYS):59
Total number of negatively charged residues (ASP + GLU):43
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    56140
Absorption 0.1% (=1 g/l)    1.007,   assuming all pairs of CYS residues form cystines

Ext. coefficient    54890
Absorption 0.1% (=1 g/l)    0.985,   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 : 37.06

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.43, 26.82, 18.93]

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:74.0631
Grand average of hydropathicity (GRAVY):-0.34