Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1712
Number of amino acids:29
Molecular Weight:3163.64 Da
Theoretical pI:7.78


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)620.69%
Glutamic Acid GLU (E)13.45%
Aspartic Acid ASP (D)00%
Glycine GLY (G)413.79%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)13.45%
Histidine HIS (H)13.45%
Lysine LYS (K)13.45%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)26.9%
Glutamine GLN (Q)00%
Proline PRO (P)310.34%
Serine SER (S)00%
Arginine ARG (R)13.45%
Threonine THR (T)413.79%
Tryptophan TRP (W)13.45%
Valine VAL (V)26.9%
Tyrosine TYR (Y)26.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC133
HydrogenH200
NitrogenN38
OxygenO40
SulphurS6

FormulaC133H200N38O40S6
Total Number of Atoms:417


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):1
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8855
Absorption 0.1% (=1 g/l)    2.799,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    2.680,   assuming all CYS residues are reduced
Aromaticity:0.103

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.21

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.69, 31.03, 3.45]

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:33.4483
Grand average of hydropathicity (GRAVY):-0.24