Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4510
Number of amino acids:518
Molecular Weight:58675.59 Da
Theoretical pI:7.77


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)336.37%
Cysteine CYS (C)71.35%
Glutamic Acid GLU (E)295.6%
Aspartic Acid ASP (D)152.9%
Glycine GLY (G)377.14%
Phynylalanine PHE (F)305.79%
Isoleucine ILE (I)275.21%
Histidine HIS (H)112.12%
Lysine LYS (K)152.9%
Methionine MET (M)61.16%
Leucine LEU (L)397.53%
Asparagine ASN (N)346.56%
Glutamine GLN (Q)6913.32%
Proline PRO (P)254.83%
Serine SER (S)397.53%
Arginine ARG (R)305.79%
Threonine THR (T)193.67%
Tryptophan TRP (W)40.77%
Valine VAL (V)315.98%
Tyrosine TYR (Y)183.47%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2591
HydrogenH3998
NitrogenN752
OxygenO786
SulphurS13

FormulaC2591H3998N752O786S13
Total Number of Atoms:8140


Total number of positively charged residues (ARG + LYS):45
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    49195
Absorption 0.1% (=1 g/l)    0.838,   assuming all pairs of CYS residues form cystines

Ext. coefficient    48820
Absorption 0.1% (=1 g/l)    0.832,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 59.20

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.76, 26.06, 20.66]

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:73.417
Grand average of hydropathicity (GRAVY):-0.57