Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4967
Number of amino acids:495
Molecular Weight:55164.49 Da
Theoretical pI:5.78


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)336.67%
Cysteine CYS (C)91.82%
Glutamic Acid GLU (E)316.26%
Aspartic Acid ASP (D)275.45%
Glycine GLY (G)418.28%
Phynylalanine PHE (F)122.42%
Isoleucine ILE (I)244.85%
Histidine HIS (H)153.03%
Lysine LYS (K)295.86%
Methionine MET (M)193.84%
Leucine LEU (L)367.27%
Asparagine ASN (N)285.66%
Glutamine GLN (Q)163.23%
Proline PRO (P)224.44%
Serine SER (S)377.47%
Arginine ARG (R)183.64%
Threonine THR (T)234.65%
Tryptophan TRP (W)81.62%
Valine VAL (V)408.08%
Tyrosine TYR (Y)275.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2442
HydrogenH3774
NitrogenN660
OxygenO743
SulphurS28

FormulaC2442H3774N660O743S28
Total Number of Atoms:7647


Total number of positively charged residues (ARG + LYS):47
Total number of negatively charged residues (ASP + GLU):58
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    84730
Absorption 0.1% (=1 g/l)    1.536,   assuming all pairs of CYS residues form cystines

Ext. coefficient    84230
Absorption 0.1% (=1 g/l)    1.527,   assuming all CYS residues are reduced
Aromaticity:0.095

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.35

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.70, 25.86, 24.04]

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:77.3737
Grand average of hydropathicity (GRAVY):-0.35